必须2 Unit 4

1. 由于人类的过度猎捕，许多动物都已经灭绝了。( die out,)
2. 飞机安全着陆之后，一些人喜笑颜开，而另一些人欣慰地哭了。(burst into laughter; while; cry in relief)
3. 开车的时候，你应该注意路标。( pay attention to; road signs)
4. 香烟含有很多影响健康的化学成分，这是众所周知的事实。(contain; chemicals; affect)
5. 政府提出了一项新的政策，旨在保护城市里一些重要的历史遗迹。( put forward, preserve )
6. 根据气象报告，今天将会是一个晴朗的日子。( according to)
7. 很多工人面临失业的危险。(in danger of)
8. 昨晚我成功地与汤姆取得联系了。(succeed)
9. 如果你能在周五晚上照顾一下孩子们，我将非常感激。（appreciate）
10. 随着越来越多的森林被毁坏，每年都有大量的土壤被雨水冲走。(with…, wash away, 被动语态)

答案：

1. Because of over-hunting by human beings, many animals have died out.
2. After the plane landed safely, some people burst into laughter while others cried in relief.
3. While driving, you should pay attention to the road signs.
4. It is a well known fact that cigarettes contain many chemicals that will affect your health.
5. The government has put forward a new policy aiming at preserving the city’s important historic sites. 
6. According to the weather report, it will be sunny today.
7. Many workers are in danger of losing their job.
8. I succeeded in getting in touch with Tom last night.
9. I would appreciate it if you could take care of the kids on Friday night.
10. With more forests being destroyed, huge quantities of good earth are being washed away each year.