5. 過去常有很多鳥兒在樹林里唱歌.。

There many birds singing in the woods.

3. 鯊魚處于食物鏈的最頂端。

Sharks are the food chain.

4. 我們應(yīng)該認識到環(huán)境的重要性，并且做一些事情 來保護它。

We should realize the and do something it.

2. 我們應(yīng)該使用可再次使用的袋子而不是塑料袋。

We should use reusable bags plastic bags.

III.根據(jù)漢語意思完成句子

1. 我在繪畫方面比她有優(yōu)勢。

I her in drawing.

II.從方框中選出合適的短語，并用其適當形式填空

take part in,pay for,turn off,play a part in,make a difference,be good for,bring back,so far

1. How much did you your iPad?

2. Our actions can in our life.

3. We have learned English for six years.

4. Eating an apple every day your health.

5. Don’t forget to the lights when you leave the room.

6. Wang Hong cleaning our classroom yesterday.

7. Many students have ever anenvironmental project.

8. The photographs many pleas ant memories.

10. The government made some (法律) to protect the environment.

9. This can turn the (丑陋的) places into beautiful ones.

8. There is a big (木制的) table in the room.

7. She is an artist. She has many good (作品) .