一、词汇运用
1. I left my keys at home. ______ (因此), I had to wait outside the office.
2. If we don't ______ (行动) now, I'm afraid the situation will become worse.
3. Air pollution is bad for our ______ (肺). We should deal with it as soon as possible.
4. The room beside my bedroom is used for ______ (贮存) everyday objects.
5. How many ______ (吨) of plastic waste are put into the ocean each year?
6. He ______ (拿着) the cute clay figure in his hand and couldn't stop looking at it.
7. Miss Li was very happy to ______ (回去) to work after a 5-day break.
8. Watching too many short videos ______ (伤害) not only your eyes but your mind.
9. The plan is creative, but ______ (sad), it will cost a lot of money.
10. The fire ______ (trap) the family inside the burning house for an hour.

Therefore
; act
; lungs
; storing
; tons
; held
; return
; harms
; sadly
; trapped

( ) 1. Things have changed. Nearly ______ of the land in the north-west of the city is covered by forests now.
A. two thirds
B. two third
C. second three
D. second third

A

( ) 2. — What beautiful works of art! Can I take photos of them?
— No, you mustn't. The flash (闪光灯) is ______ to them.
A. useful
B. harmful
C. harmless
D. useless

B

( ) 3. The different colours and patterns ______ the special design of the uniform.
A. put up
B. take in
C. put on
D. make up

D

( ) 4. — We don't need these old desks in the office any more.
— OK, I will have someone ______ them.
A. pay attention to B. look up on C. get rid of D. look forward to

C

( ) 5. — What places are we going to visit in Beijing, Mum?
— Our tour will ______ three places of interest. They are the Great Wall, the Summer Palace and the Palace Museum.
A. support
B. include
C. share
D. divide

B

( ) 6. The little boy looked ______ at his broken toy car with tears（眼泪）in his eyes.
"Who did it?" His voice sounded very ______.
A. sad; sadly
B. sad; sad
C. sadly; sad
D. sadly; sadly

C

( ) 7. Trees are very important to the environment. They can ______ the wind ______ the sand away.
A. stop; to blow
B. prevent; from blowing
C. protect; blowing
D. keep; blowing

B

( ) 8. — I think wetlands are very important to both animals and humans.
— ______. Let's ask more people to protect them.
A. Good idea
B. I have no idea
C. I can't agree more
D. I don't think so

C

三、完成句子
1. 我们团队由设计师和工程师组成。
Our team _________________________________________________ designers and engineers.
2. 森林充当着地球之“肺”。
Forests ____________________________________________________________.
3. 多种树有助于减缓气候变化。
Planting more trees helps ____________________________________________.
4. 在雨季,这个水库能够容纳数百万吨水。
The reservior can ____________________________________ water in the rainy season.

is made up of
; act like the "lungs" of the earth
; slow down climate change
; hold millions of tons of