北京市朝阳区七年级上学期期末英语试题（解析版）-A4

这是一份北京市朝阳区七年级上学期期末英语试题（解析版）-A4，共15页。试卷主要包含了本试卷共8页，5分，共6分）， —Hi, Dad等内容，欢迎下载使用。
（考试时间90分钟 满分60分）
考生须知
1.本试卷共8页。在试卷和答题卡上准确填写学校名称、班级、姓名和考号。
2.试题答案一律填涂或书写在答题卡上，在试卷上作答无效。
3.在答题卡上，选择题用2B铅笔作答，其他试题用黑色字迹签字笔作答。
4.考试结束，将本试卷和答题卡一并交回。
第一部分
本部分共33题，共40分。在每题列出的选项中，选出最符合题目要求的一项。
一、单项填空（每题0.5分，共6分）
从下面各题所给的A、B、C三个选项中，选择可以填入空白处的最佳选项。
1. My mther is a music lver. ________ ften plays the erhu in the park.
A. IB. YuC. She
【答案】C
【解析】
【详解】句意：我妈妈是一个音乐爱好者。她经常在公园拉二胡。
考查代词辨析。I我；Yu你，你们；She她。根据“My mther is a music lver.”和“plays”可知，此处使用she，指代my mther。故选C。
2. In ur schl, the Reading Festival starts ________ September every year.
A. inB. nC. at
【答案】A
【解析】
【详解】句意：在我们学校，读书节每年九月开始。
考查时间介词。in用于月份、年份、季节等较长的时间段；n用于具体到天的时间；at用于钟点时刻前。根据“ September”表示月份可知，空处用介词in。故选A。
3. Our schl dining hall is nt big, ________ the fd is really gd.
A. andB. butC. s
【答案】B
【解析】
【详解】句意：我们学校食堂不大，但是食物很好吃。
考查连词辨析。and和，然后；but但是；s因此。分析题干，前后句“我们学校的食堂不大”与“食物很好吃”之间是转折关系，应用but连接，意为“但是”。故选B。
4. In China, there ________ many dctrs n duty during festivals.
A. isB. areC. was
【答案】B
【解析】
【详解】句意：在中国，节日期间有很多医生值班。
考查there be句型。is是，单数；are是，复数；was是，过去式。there be句型遵循就近原则，主语many dctrs为复数形式，be动词用are。故选B。
5. This is my ________ ntebk. Her name is n it.
A. brther’sB. father’sC. sister’s
【答案】C
【解析】
【详解】句意：这是我姐姐的笔记本。她的名字在上面。
考查名词所有格。brther’s兄弟的；father’s父亲的；sister’s姐姐的。根据“Her name is n it”可知，此处指的是女性，故选C。
6. The Dragn Bat Festival ________ takes place n the fifth day f the fifth lunar mnth.
A. alwaysB. smetimesC. never
【答案】A
【解析】
【详解】句意：端午节总是在农历五月初五举行。
考查副词辨析。always一直，总是；smetimes有时，偶尔；never从不。结合句意及生活常识可知，端午节一直以来都在农历五月初五举行。故选A。
7. —Hi, Dad. ________ is my electric guitar?
—It is in yur bedrm.
A. WhereB. WhenC. What
【答案】A
【解析】
【详解】句意：——嗨，爸爸。我的电吉他在哪里？——在你的卧室里。
考查特殊疑问句。where哪里；when什么时候；what什么。根据“It is in yur bedrm”可知，此处询问的是地点，故选A。
8. My grandpa ________ tea with his ld friends every weekend.
A. drinksB. is drinkingC. wil drink
【答案】A
【解析】
【详解】句意：我爷爷每个周末都和他的老朋友喝茶。
考查时态。根据“every weekend”可知，时态为一般现在时，主语My grandpa为单数，谓语动词drink用三单形式drinks。故选A。
9. —Lk! The mnkeys ________ trees.
—Yes. They mve s fast!
A. climbB. will climbC. are climbing
【答案】C
【解析】
【详解】句意：——看！猴子在爬树。——是的。它们移动如此快！
考查时态。根据“Lk!”可知用现在进行时，其结构为am/is/are ding。故选C。
10. My mther’s birthday is cming sn. I ________ a card fr her tmrrw.
A. makeB. will makeC. made
【答案】B
【解析】
【详解】句意：我妈妈的生日快到了。明天我将为她做一张卡片。
考查动词时态。根据“tmrrw”可知，时态是一般将来时，结构是will d，故选B。
11. We like ________ a family pht every year. It is a must in my family.
A. tkB. takeC. taking
【答案】C
【解析】
【详解】句意：我们喜欢每年拍一张全家福。这在我家是必须的。
考查动名词like ding sth“喜欢做某事”，空处用动名词形式taking。故选C。
12. — Hw abut wrapping the gifts in ld newspapers?
— ________
A. Thanks.B. Gd idea.C. Yu are welcme.
【答案】B
【解析】
【详解】句意：——用旧报纸包礼物怎么样？——好主意。
考查情景交际。Thanks.谢谢；Gd idea.好主意；Yu are welcme.不客气。根据“Hw abut wrapping the gifts in ld newspapers?”可知，空处应是对该建议的回应，“Gd idea”表示赞同和接受该建议，符合语境。故选B。
二、完形填空（每题1分，共8 分）
阅读下面的短文，掌握其大意，然后从短文后各题所给的A、B、C三个选项中，选择最佳选项。
I’ll never frget Nvember 23rd! I was s excited t be part f the cncert (音乐会) at the Schl Arts Festival in ur city. It was fr the winners f the 15th Schl Music Cmpetitin.
When I first gt the news that I culd take part in the cncert, I was very happy but a little bit ____13____. I practiced my pian piece ver and ver again. I wanted t play it really well. But I wrried I might make a mistake during the ____14____.
On the day f the cncert, the hall was really big and I almst gt lst. I asked a kind wrker fr ____15____, and she shwed me the way t the stage.
Befre my perfrmance (表演), I saw a lt f ther yung winners frm different schls. I felt a little scared. Waiting fr my turn, my heart was beating ____16____. But I remembered hw much I had practiced and tld myself t be brave.
It was my turn. I walked nt the stage. There were s many peple ____17____. I tk a deep (深的) breath and began t play my pian piece. At first, I was nervus. But then I gt int the ____18____ and did my best.
After ur perfrmance, a music teacher talked abut hw imprtant this cmpetitin was. She said that the cncert was a traditin in ur city. And she was happy t see ur ____19____ fr music during the shw. Her wrds made me feel prud (自豪的) t be part f it. I fund that thrugh music, we can ____20____ with peple frm different schls. This cncert was amazing!
13. A. sadB. nervusC. angry
14. A. hlidayB. classC. cncert
15. A. helpB. fdC. paper
16. A. lightlyB. slwlyC. fast
17. A. watchingB. writingC. drawing
18. A. stryB. musicC. film
19. A. planB. lveC. advice
20. A. checkB. readC. cnnect
【答案】13. B 14. C 15. A 16. C 17. A 18. B 19. B 20. C
【解析】
【导语】本文主要讲述了作者参加城市学校艺术节音乐会的经历。
【13题详解】
句意：当我第一次得到我可以参加音乐会的消息时，我很高兴，但有一点点紧张。
sad伤心的；nervus紧张的；angry生气的。根据“When I first gt the news”和“But I wrried”可知，第一次知道这个消息应是又高兴又有点紧张，故选B。
【14题详解】
句意：但我担心我可能会在演唱会上犯错误。
hliday假期；class课程；cncert音乐会。根据“ I culd take part in the cncert”可知，此处指担心在音乐会上犯错，故选C。
【15题详解】
句意：我向一位好心的工作人员求助，她带我去了舞台。
help帮助；fd食物；paper纸。根据“I almst gt she shwed me the way t the stage”可知，此处指向工作人员求助，故选A。
【16题详解】
句意：我的心跳得很快。
lightly轻轻地；slwly慢慢地；fast快速地。根据“I felt a little scared.”及常识可知，人在害怕的时候通常会心跳加速，故选C。
【17题详解】
句意：有很多人看着。
watching看着；writing写着；drawing画着。根据“I walked nt the stage. There were s many peple...”及上文可知，是在音乐会上，所以作者上台后，有很多人看着，故选A。
【18题详解】
句意：但后来我投入到音乐中，尽了最大的努力。
stry故事；music音乐；film电影。根据“play my pian then I gt int did my best.”可知，此处指慢慢投入到了音乐中，故选B。
【19题详解】
句意：她很高兴在节目中看到我们对音乐的热爱。
plan计划；lve热爱；advice建议。根据“happy t see ur ... fr music during the shw”可知，这是音乐会表演，所以应是看到了大家对音乐的热爱，故选B。
【20题详解】
句意：我发现，通过音乐，我们可以与来自不同学校的人联系起来。
check检查；read阅读；cnnect把……联系起来。根据“thrugh music, we can peple frm different schls”可知，应是音乐可以把不同学校的人联系起来，故选C。
三、阅读理解（每题2分，共26分）
（一）阅读下列建议，请根据人物提出的问题，匹配最适合的建议，并将建议所对应的A、B、C、D选项填在相应位置上。选项中有一项为多余选项。
A
Useful advice
【答案】21. B 22. C
23. A
【解析】
【导语】本文就Emily，Jane和Tny出现问题，选择对应的建议。
【21题详解】
根据“I want t make mre friends.”可知，Emily想交朋友，B项“努力多和你的新同学交谈。你也可以加入一些俱乐部。这是一个交朋友的好方法。”符合要求，故选B。
【22题详解】
根据“There are s many tasks. It’s hard t plan my time.”可知，Jane有很多任务要完成，需要计划时间，C项“你可以每天写下你的任务和每项任务的时间。把大任务分成小任务。然后先做最重要的事情。”符合要求，故选C。
【23题详解】
根据“I have n time t play because my mther always asks me t d maths exercises.”可知，Tny和妈妈的相处出现了问题，A项“你最好和你妈妈谈一谈。只学习而不玩耍会使人变得迟钝。还有，一定要学好数学。”符合要求，故选A。
（二）阅读下列短文，根据短文内容，从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。
B
As the new schl year started, Emma was excited t be the leader f the Envirnmental Club. The club always tries hard t make ur planet better by getting peple t recycle (回收) mre things. This year, Emma wanted t d smething different t get mre peple t take part.
One day, when Emma was lking n the Internet, she knew abut the big prblem f plastic waste. She was really shcked t knw hw bad it was fr ur envirnment. S, she decided t take actin.
At the next club meeting, Emma shared her idea with ther club members. She said, “Let’s have a plastic waste cllectin activity this year!” All the members thught it was a great idea. T let everyne knw abut this activity, they started t make clurful psters and put them up arund the schl.
The big day f the event arrived. Lts f students and their family came t the schl with bags full f plastic waste. Emma and her club members were s busy cllecting the waste but they were still very happy.
At the end f the day, Emma heard sme students talk abut hw they understd the imprtance f recycling. She smiled. A simple actin culd help t create a greener future fr everyne.
24. What did Emma knw abut when she was lking n the Internet?
A. The big prblem f plastic waste.B. The different kinds f plastic waste.
C. The recycling ways f plastic waste.D. The useful prducts f plastic waste.
25. T let everyne knw abut their activity, the club members ________.
A. cllected peple’s plastic bagsB. gave a speech n plastic waste
C. prepared an envirnmental classD. made and put up clurful psters
26. What culd be the best title fr the passage?
A. The new schl year.B. Different schl clubs.
C. Actin fr a green future.D. Emma’s schl subjects.
【答案】24. A 25. D 26. C
【解析】
【导语】本文讲述了Emma作为环保俱乐部的负责人，在新学年开始时决定开展一项塑料废品收集活动，以提高人们对回收重要性的认识。
【24题详解】
细节理解题。根据文中“One day, when Emma was lking n the Internet, she knew abut the big prblem f plastic waste”可知，Emma在网上了解到塑料垃圾的大问题，故选A。
【25题详解】
细节理解题。根据文中“T let everyne knw abut this activity, they started t make clurful psters and put them up arund the schl.”可知，为了让大家知道他们的活动，社团成员制作并张贴了彩色海报，故选D。
【26题详解】
最佳标题题。根据全文内容，特别是最后一句“A simple actin culd help t create a greener future fr everyne.”可知，主要介绍为了一个更绿色的未来而采取的行动，故选C。
C
Plants: mre than we thught
Plants are amazing! In the past, there were sme ideas that plants had feelings and culd act like humans. But nw, new research shws plants are unusual in their wn ways.
Prtecting themselves
One way is in hw plants prtect themselves. Fr example, when wrms (虫子) eat them, tmat plants can make their leaves taste bad with a special juice. This can even make the wrms eat each ther! Crn plants can check what wrms leave behind and then use that infrmatin t call a bee t hunt the wrms.
Plant cmmunicatin (沟通)
Plants can als talk t each ther. They mainly use special air. There are small penings n plants that lk like little fish muths under a micrscpe. These penings let ut air with infrmatin. When a plant has prblems, like being eaten r hurt by wind, it sends a “call”. Other plants clse t it can get this “call” and get ready t stay safe.
Plant Memry
D plants have memry? There’s the “memry f winter”. Many fruit trees need t “remember” the number f cld days in winter t flwer (开花) in spring. They remember the cld and warm days t stp flwering t early during a warm time in winter.
Nw, when we lk at plants in a park, we can think f them as little “strangers” (陌生人) with their wn “stries” ging n all arund. We dn’t knw if they feel pain, but they feel tuch r being eaten and react (反应), even thugh they dn’t feel pain like we d.
27. Accrding t Paragraph 2, tmat plants prtect themselves by ________.
A. changing their shapeB. grwing bigger leaves
C. hiding frm the wrmsD. making leaves taste bad
28. Why d many fruit trees have the “memry f winter”?
A. T enjy the sunshine.B. T keep warm in winter.
C. T feel pain like humans.D. T flwer at the right time.
29. What is the main idea f the passage?
A. Plants have a fantastic memry.B. Plants are amazing in different ways.
C. Plants have magic cmmunicatin skills.D. Plants are gd at prtecting themselves.
【答案】27. D 28. D 29. B
【解析】
【导语】本文主要描述了植物在不同方面的奇妙特性，比如自我保护、沟通和记忆，说明植物的多样性和独特性。
【27题详解】
细节理解题。根据“Fr example, when wrms (虫子) eat them, tmat plants can make their leaves taste bad with a special juice.”可知，番茄通过制作特殊汁液让叶子变得难吃来保护自己，故选D。
【28题详解】
细节理解题。根据“Many fruit trees need t ‘remember’ the number f cld days in winter t flwer (开花) in spring.”可以，果树需要“冬天的记忆”来确保在春天合适的时候开花。故选D。
【29题详解】
主旨大意题。通读全文，文章主要描述了植物在不同方面的奇妙特性，比如自我保护、沟通和记忆，说明植物的多样性和独特性。故选B。
D
Elephants shuldn’t be in captivity (圈养)
Elephants are really fantastic animals. We nw have gd reasns t believe that they are sme f the mst clever and scial animals arund. This makes us think abut hw we shuld take care f them.
In the past ten years, there have been stries abut elephants with surprising skills. Scientists (科学家) have fund that elephants are even cleverer than we used t think.
Elephants in the wild shw their intelligence (智慧) in many ways. Fr example, they remember where water hles (坑) are and g back there t drink later. They can use their trunks t reach fd and water in hard-t-reach places. They might even knw wh they are.
New studies tell us that wild elephants have many ther special scial skills.
They talk t each ther in different ways and make decisins tgether. They wrk tgether t slve prblems. Als, elephants are very helpful t each ther. Mthers and children stay tgether in families. They take care f each ther’s babies and prtect the yung nes. What’s mre, elephants have strng friendships. They are sad when ne f them dies. When ne elephant is sad, thers try t make it happy. When they succeed (成功), they celebrate tgether.
Sme scientists think elephants shuldn’t be in captivity. Zs can’t give them the right living envirnment like the wild. Their great intelligence means they need mre space. We shuld think abut setting them free. Keeping such clever animals in captivity is wrng. In the future, we might lk back and be surprised that we ever did this.
30. What have scientists fund in the past ten years?
A. Elephants are mre scial than befre.B. Elephants have the same skills as humans.
C. Elephants are cleverer than we thught befre.D. Elephants have the intelligence t make stries.
31. Accrding t Paragraph 3, hw d elephants shw their intelligence?
A They can remember places with water.B. They can use their trunks t knw weather.
C. They build their hmes in small water hles.D. They talk t ther animals t knw each ther.
32. Which f the fllwing is TRUE accrding t the passage?
A. Zs are the best hmes fr elephants.B. Elephants are helpful and friendly animals.
C. Elephant babies live away frm their mthers.D. Humans have strng friendships with elephants.
33. What is the writer’s main purpse in writing this passage?
A. T call n peple t set elephants free.B. T talk abut the fd prblems f animals.
C. T describe elephants’ influences n nature.D. T explain the reasns f studying elephants.
【答案】30. C 31. A 32. B 33. A
【解析】
【导语】本文主要讲述了大象是聪明的动物，它们有很强大的社交能力，作者号召人们释放它们。
【30题详解】
细节理解题。根据“In the past ten years, there have been stries abut elephants with surprising skills. Scientists (科学家) have fund that elephants are even cleverer than we used t think.”可知，在过去的十年里，科学家发现大象比我们以前想象的要聪明。故选C。
【31题详解】
细节理解题。根据“Fr example, they remember where water hles (坑) are and g back there t drink later.”可知，大象能记住有水的地方。故选A。
【32题详解】
细节理解题。根据“elephants are very helpful t each ther”及“elephants have strng friendships”可知，大象是乐于助人、友好动物。故选B。
【33题详解】
主旨大意题。根据“We shuld think abut setting them free.”及通读全文可知，作者写这篇文章的目的是为了呼吁人们释放大象。故选A。
第二部分
本部分共5题，共20分。根据题目要求，完成相应任务。
四、阅读表达（第34-36题每题2分，第37题4分，共10分）
阅读短文，根据短文内容回答问题。
Try mre meaningful “firsts” t make mre happy memries!
When I ask my grandma abut her favrite memries, she talks abut the events when she was 20 years ld. Dr. Smith’s study shws that we remember new and exciting things better. Mst f ur memries are abut first-time experiences r special events.
At the age f six, I went t a big fun park with my parents fr the first time. It was s exciting fr a little girl! We went there by bus, talking and laughing all the way. At the park, I tried riding the rller caster fr the first time. My heart raced as we went up and dwn. It felt like a dream. Tday, these special memries are still in my mind. That’s the pwer f “firsts”.
I remember my first art lessn in junir high. I even remember my first maths teacher in my primary schl. In fact, first-time experiences tk place at the beginning f the schl year, arund 40% in September and 16% in Octber. Thse first-time experiences can stay in ur memries fr many years.
There’s a secret t making happy memries — we can create mre happy mments by trying meaningful things and having lts f “firsts”, because peple remember new and exciting things better. S, let’s use this t make ur lives full f memrable (值得纪念的) and meaningful mments.
34 What des Dr. Smith’s study shw?
__________________________________
35. Hw did the writer and her parents g t the big fun park?
__________________________________
36. What can stay in ur memries fr many years?
__________________________________
37. D yu want t make mre happy mments by trying mre meaningful “firsts”? Why r why nt? (Please give tw reasns.)
__________________________________
【答案】34. We remember new and exciting things better.
35. By bus.
36. Thse first-time experiences.
37. Yes. Because peple remember new and exciting things better. Als, we can use this t make ur lives full f memrable and meaningful mments.（答案不唯一，合理即可。）
【解析】
【导语】本文作者通过自身的几个第一次经历，说明了人们对新奇和首次经历的记忆更深刻。
【34题详解】
根据“Dr. Smith’s study shws that we remember new and exciting things better”可知，史密斯博士的研究表明，我们能更好地记住新鲜和令人兴奋的事物。故填We remember new and exciting things better.
【35题详解】
根据“We went there by bus”可知，他们是坐公交车取去的，故填By bus.
【36题详解】
根据“Thse first-time experiences can stay in ur memries fr many years.”可知，那些第一次的经历可以留在我们的记忆中很多年，故填Thse first-time experiences.
【37题详解】
开放性问题，答案合理即可。参考答案：Yes. Because peple remember new and exciting things better. Als, we can use this t make ur lives full f memrable and meaningful mments.
五、文段表达（10分）
38. 12月4日，“春节——中国人庆祝传统新年的社会实践”列入联合国教科文组织人类非物质文化遗产代表作名录。为了传承中华优秀传统文化成果，学校英文俱乐部正积极开展主题为“春节中的文化回响”的征文活动。
假如你是李华，请你用英文写一篇文章投稿，介绍你和谁一起庆祝春节，通常有哪些庆祝活动，以及你的感受。
要求：根据中文和英文提示，完成一篇不少于40词的英语文段写作。文中已给出内容不计入总词数。所给提示词语仅供选用。请不要写出你的校名和姓名。
提示词语：
parents, clean the huse, put up paper-cuttings, have a family dinner, happy
提示问题：
·Wh d yu celebrate the Spring Festival with?
·What activities d yu usually d?
·Hw d yu feel?
Fr Chinese peple, the Spring Festival is very imprtant. _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
【答案】例文
Fr Chinese peple, the Spring Festival is very imprtant. I always celebrate it with my parents.
Befre the Spring Festival, my family clean the huse tgether and we put up paper-cuttings. On New Year’s Eve, we always have a big family dinner. Making and eating dumplings is a family traditin, because dumplings stand fr gd luck in Chinese culture.
I feel happy during this festival because the whle family can get tgether. It’s full f lve and fun.
【解析】
【详解】[总体分析]
①题材：本文是一篇材料作文；
②时态：时态为“一般现在时”；
③提示：写作要点已给出，考生应注意不要遗漏“信息提示”中的介绍要点，适当添加细节，并突出写作重点。
[写作步骤]
第一步，介绍春节是最重要的假期，我总是和父母一起过；
第二步，具体阐述春节期间都干什么；
第三步，书写感受。
[亮点词汇]
①put up张贴
②stand fr代表
③be full f充满
[高分句型]
①Making and eating dumplings is a family traditin, because dumplings stand fr gd luck in Chinese culture. (动名词作主语)
②I feel happy during this festival because the whle family can get tgether. (because引导的原因状语从句)
39. 今年是北京“根与芽”（Rts& Shts）项目成立30周年。为了提高全校师生对动物保护的意识，学校的“根与芽”小组和英文俱乐部正共同开展“根与芽吉祥物（masct）”的推荐活动。
假如你是李华，请你写一篇英文稿件参加此次活动，介绍你推荐的吉祥物是什么动物，它的外形是什么样子，并谈谈你推荐的理由。
要求：根据中文和英文提示，完成一篇不少于40词的英语文段写作。文中已给出内容不计入总词数。所给提示词语仅供选用。请不要写出你的校名和姓名。
提示词语：
panda, black and white, cute, stand fr, friendly
提示问题：
·Which animal d yu chse t be the masct?
·What des it lk like?
·Why d yu chse it?
I’m very excited t take part in this activity. _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
【答案】例文
I’m very excited t take part in this activity. I wuld like t chse the panda t be the masct.
The panda is black and white, and has a rund head. It mainly eats bamb. It enjys fruits and vegetables as well. Als, the panda likes lying in the sun and taking a rest. It is s cute and friendly. When we see the panda, we feel very happy!
I think the panda stands fr Chinese culture, that is, the kindness and harmny f Chinese peple.
【解析】
【详解】[总体分析]
①题材：本文是一篇材料作文；
②时态：本文应使用“一般现在时”为主；
③提示：应注意题干给出的要点并适当补充，使文章内容充实。
[写作步骤]
第一步，推荐熊猫为吉祥物；
第二步，根据题干的要点，详细描述熊猫的外形特征以及推荐理由；
第三步，总结熊猫代表着中国文化和中国人民，并收尾。
[亮点词汇]
①as well也
②stand fr代表
[高分句型]
①The panda is black and white, and has a rund head.（and连接并列句）
A
Yu’d better have a talk with yur mther. Just studying all the time with n play will make a persn dull (无趣的). Als, make sure yu study maths well.
B
Try t talk mre with yur new classmates. Yu can als jin sme clubs. It’s a gd way t make friends.
C
Yu can write dwn yur tasks and the time fr each task every day. Turn a big task int small nes. Then d the mst imprtant things first.
D
Just learning is nt enugh. It’s imprtant t think mre in yur learning. This way, yu can understand the teachers’ wrds better during class.
___21___
I feel lnely in my new class. I want t make mre friends.
___22___
I am s busy every day. There are s many tasks. It’s hard t plan my time.
___23___
I have n time t play because my mther always asks me t d maths exercises.