一、从课文中找到对应的英文词组，完成练习
1. 保持平衡
2. 大量的咸水
3. 升腾到空中
4. 消除污染
5. 构成
6. 称森林为地球之“肺”

1. keep the balance
2. plenty of salt water
3. rise to the sky
4. get rid of pollution
5. make up
6. call forests the "lungs" of the earth

二、从课文中找到对应的英文句子，完成练习
1. 一个生态系统包括一个区域内所有的生物和非生物。
An ecosystem .
2. 它覆盖了约71%的地球表面，并产生了约70%的地球氧气。
It covers and produces .
3. 在大雨期间，湿地像巨大的海绵一样储存水分。
During heavy rains, .
4. 它们还把有害物留滞在叶片内，帮助净化空气。
They also .

1. includes all the living and non-living things in an area
2. about 71% of the earth's surface; about 70% of the earth's oxygen
3. wetlands store water like huge sponges
4. trap harmful things in their leaves and help clean the air

一、根据句意、中文释义和首字母提示，写出句中所缺单词
1. A good British breakfast always (包括) milk and bread.
2. What about (拿着) the books for your dad?
3. Mary didn’t (返回) home till eleven o’clock. It made her mum so angry.
4. James knows a lot about science. He can a as a guide when we go to the Science Museum.
5. Throwing rubbish everywhere is h to the environment.

1. includes
2. holding
3. return
4. act
5. harmful

二、用方框中所给单词或词组的正确形式替换各句画线部分
cover clear away as a result hold
1. Forests make up nearly a third of the earth's land area.
2. Plants in wetlands help get rid of pollution and make the water clean.
3. They also trap harmful things in their leaves and help clean the air.
4. Therefore, people often call forests the "lungs" of the earth.

1. cover
2. clear away
3. hold
4. As a result

() 1. The medicine will help Tom get rid his headache.
A. on
B. off
C. of
D. out
() 2. All the things on earth are equal (平等的).
A. live
B. alive
C. lively
D. living
() 3. The total weight of the laptop is 2 kg.
A. about
B. along
C. among
D. ahead
() 4. The school is going to a sports meeting next month.
A. take place
B. give
C. hold
D. send

1. C
2. D
3. A
4. C