外研版 (2019)选择性必修 第四册Unit 5 Into the unknown精品学案

这是一份外研版 (2019)选择性必修 第四册Unit 5 Into the unknown精品学案，共9页。


1. T review and master the usages f nun clauses, and crrectly use them in real cntexts.
2. T develp integrated skills f listening and speaking by cmpleting relevant tasks.
3. T learn and use new wrds and expressins used fr relating the unknwn and mysteries.
1. T decide cnnectives intrducing nun clauses and crrectly use nun clauses in specific cntexts.
2. T extract key infrmatin t cmplete tasks when listening t the interview abut sleep-related mysteries.
3. T talk abut facing the unknwn r mysteries using new wrds and expressins in the lessn.
Key wrds and expressins fr Perid One
Step 1 Review nun clauses
Activity 1
Fill in the blanks with prper cnnectives, and then decide the types and functins f nun clause.
A. Althugh his thery has been dismissed by schlars, it shws ________ pwerful the secrets f Ancient May civilizatin are amng peple.
B. But the greatest mystery f all is _________ caused the Maya t abandn mst f their great cities.
C. __________ Maya civilizatin cllapsed in the early 16th century remains a mystery.
D. The fact _________ Maya sciety was technlgically primitive makes its achievements all the mre incredible and mysterius.
Step 2 Practice Activity 2 & Activity 3
Activity 2 Cmplete the nun clauses with wrds in brackets.
1. In fact, it seems that they appeared very different frm ___________ (think).
2. In recent, scientists have wrked ut ____________ (lk): many f them were small with feathers.
3. Hwever, __________ (have) feathers still isn’t clear--it might have been fr cmmunicating r fr staying warm, but nt just fr flight.
4. It seems _____________ (depend n) their habitats. That is, dinsaurs which culd fly wuld have had different clrs t thse living in the sea.
Activity 3 Talk abut what caused the disappearance f dinsaurs using nun clauses where apprpriate. Here are the ntes t help yu.
Amng the many unslved mysteries abut dinsaurs, what really interests me is their disappearance. One pssible explanatin is that __________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________.
Step 3 Fcus n vcabulary abut facing the unknwn
Activity 5 Read the passage and answer the questin.
1. What is the flight instinct? Why d sme peple react that way in the face f the unknwn?
2. What ther reactins culd peple have when facing the unknwn?
Activity 6 Put the wrds and expressins int the table.
Step 4 Listening
Activity 7
Befre listening, understand the reading material n Page 55.
1. What functins f the brain are mentined in the passage?
2. What is the current research situatin cncerning the brain?
3. Share sme interesting facts abut the brain with the class.
Activity 8 & Activity 9
Listen t the interview and finish the fllwing tasks.
1. Chse the tpic discussed in the interview.
A. Methds t keep the brain healthy and active.
B. Sleep-related mysteries.
C. Ways f imprving sleep quality.
D. Methds f interpreting dreams.
2. Listen again and cmplete the table n Page 55 shwing theries abut the human brain and Dr Lng’s cmments.
Step 5 Psting listening
Activity 10 Useful expressins fr asking fr mre infrmatin and explaining.
Step 6 Discussin
Activity 11
Talk abut the investigatin int anther scientific mystery.
Step 7 Language appreciatin
1. There are many mysteries abut dinsaurs t which we lng t find explanatins.
[句式分析] “t which we lng t find explanatins” 为_________从句，其结构为“介词 t +which +从句”用来修饰说明先行词 mysteries abut dinsaurs。 其中介词与explanatins构成固定搭配explanatins t sth意为“对...的解释”；固定短语lng t d sth意为“____________________”。
[尝试翻译] 。
2. Interestingly, it is the back part f the brain that is invlved with ur visin.
[句式分析] 本句为____________ 句式，“It’s + ____________+that +句子的其余部分”，本语境为“It’s +主语+ that+句子的其余部分”，句中短语be invlved with意为“________________________”。
[尝试翻译] 。
【参考答案】
Step 1 Review nun clauses
Activity 1 【答案】
Fill in the blanks with prper cnnectives, and then decide the types and functins f nun clause.
A. Althugh his thery has been dismissed by schlars, it shws hw pwerful the secrets f Ancient May civilizatin are amng peple.
B. But the greatest mystery f all is what caused the Maya t abandn mst f their great cities.
C. Why Maya civilizatin cllapsed in the early 16th century remains a mystery.
D. The fact _ that Maya sciety was technlgically primitive makes its achievements all the mre incredible and mysterius.
Step 2 Practice Activity 2 & Activity 3
Activity 2 Cmplete the nun clauses with wrds in brackets. 【答案】
1. In fact, it seems that they appeared very different frm ___________ (think).
→what peple think
2. In recent, scientists have wrked ut ____________ (lk): many f them were small with feathers.
→what they lked like
3. Hwever, __________ (have) feathers still isn’t clear--it might have been fr cmmunicating r fr staying warm, but nt just fr flight.
→what they lked like
4. It seems _____________ (depend n) their habitats. That is, dinsaurs which culd fly wuld have had different clrs t thse living in the sea.
→as if they depended n
Activity 3 Talk abut what caused the disappearance f dinsaurs using nun clauses where apprpriate. Here are the ntes t help yu.
【答案】
Amng the many unslved mysteries abut dinsaurs, what really interests me is their disappearance. One pssible explanatin is that there was a huge meterite hitting Earth. But what I believed mst was ash and gas frm erupting vlcanes. Where s much magma went, all the living things including dinsaurs lst their lives. Besides, cluds f fire and smke blcked the whle sky s that they had n sunshine t enjy and n xygen t take in.
Step 3 Fcus n vcabulary abut facing the unknwn
Activity 5 Read the passage and answer the questin.
1. What is the flight instinct? Why d sme peple react that way in the face f the unknwn?
2. What ther reactins culd peple have when facing the unknwn?
【答案】
1. Making a quick getaway. It is a human instinct.
2. They chse t subdue their fears and pursue the unknwn.
Activity 6 Put the wrds and expressins int the table. 【答案】
Step 4 Listening
Activity 7
Befre listening, understand the reading material n Page 55.
1. What functins f the brain are mentined in the passage?
2. What is the current research situatin cncerning the brain?
3. Share sme interesting facts abut the brain with the class.
【答案】
1. The brain is the centre f the nervus system and cntrls mst f the bdy’s activities. The back part f it is invlved with ur visin and the sides f it are invlved in memry, speech and rhythm.
2. There is still a lng way t g befre we can cmpletely understand the wrkings f the brain.
Activity 8 & Activity 9
Listen t the interview and finish the fllwing tasks.
1. Chse the tpic discussed in the interview. 【答案：B 】
A. Methds t keep the brain healthy and active.
B. Sleep-related mysteries.
C. Ways f imprving sleep quality.
D. Methds f interpreting dreams.
2. Listen again and cmplete the table n Page 55 shwing theries abut the human brain and Dr Lng’s cmments.
【答案】
Step 5 Psting listening
Activity 10 Useful expressins fr asking fr mre infrmatin and explaining. 【答案】
Step 6 Discussin
Activity 11
Talk abut the investigatin int anther scientific mystery. 【答案】
Pssible visin：
The aliens are a general term used by humans t describe imaginary life frm ther planets. Nwadays, the human beings have nt actually detected whether there are aliens in universe, thugh quiet a few peple said that they witnessed alien visit the earth.
In the last 50 years f researches, astrnmers have nt fund any cnclusive evidence f extraterrestrial life.
Step 7 Language appreciatin
1. There are many mysteries abut dinsaurs t which we lng t find explanatins.
[句式分析] “t which we lng t find explanatins” 为 定语 从句，其结构为“介词 t +which +从句”用来修饰说明先行词 mysteries abut dinsaurs 其中介词与explanatins构成固定搭配explanatins t sth意为“对...的解释”；固定短语lng t d sth意为“渴望做某事”。
[尝试翻译] 有许多关于恐龙的谜团，我们渴望找到解释。
2. Interestingly, it is the back part f the brain that is invlved with ur visin.
[句式分析] 本句为 强调句 句式“It’s + 被强调部分 +that +句子的其余部分”，本语境为“It’s +主语+ that+句子的其余部分”，句中短语be invlved with意为“与...关联，涉及到”。
[尝试翻译] 有趣的是，大脑的后部与我们的视觉有关。
1 make a getaway
9 set ut
2 run fr ne’s life
10 unchanged
3 check ut
11 delve
4 test the waters
12 threw neself int
5 steer clear f...
13 think twice
6 retreat
14 shrink frm
7 subdue
15 lk int
8 the unknwn
16 investigatin
1
subject clause
It serves as the subject f the sentence.
2
bject clause
It serves as the bject f the sentence.
3
predictive clause
It serves as the predictive f the sentence.
4
appsitive clause
The clause gives further infrmatin abut the nun befre the clause.
What caused the disappearance f dinsaurs:
1 a huge meterite hitting Earth 2 ash and gas frm erupting vlcanes 3 disease
1 make a quick getaway
9 set ut int
2 run fr ne’s lives frm
10 delve int
3 check ut
11 think twice
4 test the waters f
12 take actin
5 steer clear f
13 shrink frm
6 retreat t
14 lk int
7 subdue
15 cnsider ne’s ptins
8 endure

Aviding
Explring
Overcming
Hesitating
Theries
The brain needs time t 1 ____________________
The brain 3 _______________ when we’re awake. It needs sleep t 4 ______________
7 __________ in the brain while we’re awake, and the brain reflects n them and 8 ______ in ur dreams.
Dr Lng’s
cmments
Recent students prve that ur brains 2 ______________ during sleep.
There isn’t 5 ___________ t cnfirm this. It might nt be 6 _____________ fr sleep.
A lt f research has been cnducted, but we still can’t prve that 9 _____________.
Unanswered questins
✭ Why d we “see” ur dreams?
✭10 _______________________________________
1 Culd yu tell us smething
2 It’s because...
3
4 What ther reasns culd there be fr it?
5 Wuld yu tell us mre
Asking fr mre infrmatin
Explaining
1
subject clause
It serves as the subject f the sentence.
C
2
bject clause
It serves as the bject f the sentence.
A
3
predictive clause
It serves as the predictive f the sentence.
B
4
appsitive clause
The clause gives further infrmatin abut the nun befre the clause.
D
What caused the disappearance f dinsaurs:
1 a huge meterite hitting Earth
2 ash and gas frm erupting vlcanes 3 disease
1 make a quick getaway
9 set ut int
2 run fr ne’s lives frm
10 delve int
3 check ut
11 think twice
4 test the waters f
12 take actin
5 steer clear f
13 shrink frm
6 retreat t
14 lk int
7 subdue
15 cnsider ne’s ptins
8 endure

Aviding
Explring
Overcming
Hesitating
1/2//6/13
3/4/9/10/14
7/8/12
11/15
Theries
The brain needs time t 1 ____________________
The brain 3 _______________ when we’re awake. It needs sleep t 4 ______________
7 __________ in the brain while we’re awake, and the brain reflects n them and 8 ______ in ur dreams.
Dr Lng’s
cmments
Recent students prve that ur brains 2 ______________ during sleep.
There isn’t 5 ___________ t cnfirm this. It might nt be 6 _____________ fr sleep.
A lt f research has been cnducted, but we still can’t prve that 9 _____________.
Unanswered questins
✭ Why d we “see” ur dreams?
✭10 _______________________________________
1 rest and d maintenance
6 the mst imprtant reasn
2 remain active
7 New cnnectins are frmed between parts.
3 makes lts f pisnus chemicals
8 use them t frm new memries
4 remve these chemicals
9 sleep is necessary t this functin
5 enugh data
10 Why d peple dream in clr and ther dn’t?
1 Culd yu tell us smething
2 It’s because...
3
4 What ther reasns culd there be fr it?
5 Wuld yu tell us mre
Asking fr mre infrmatin
Explaining
1/ 4/ 5
2/ 3