4. 現(xiàn)在河流比以前干凈多了。

The river is

3. 那家工廠過去常把廢棄物倒人河中。

The factory  its the river.

2. 政府已將部分鎮(zhèn)中心變成了新公園。

The government a new park.

四、完成句子。(20分)

1. 這個小鎮(zhèn)在幾年中已經(jīng)發(fā)生了很大變化。

The small town

10. It’s necessary for us (realize) the importance of environment protection.

9. About 30,000 people (live) in this small town in the past.

8. We lived together until 1960 when I (get) married.

7. My bike isn’t here at the moment. Who (take) it away?

6. The little boy is crying sadly because he (not pass) the exam.

5. Mike and Mark (do) their homework since half an hour ago.