1 . If necessary, don't________ (犹豫；迟疑) to give me a call. （根据汉语提示单词拼写）

3 . If everyone ________ (分类) their garbage, we can recycle useful materials and reduce pollution. （根据汉语提示单词拼写）

4 . Is there anyone in your class _______ family is in the country? （用适当的词填空）

5 . While________ (climb) the mountain, we enjoyed the warm sunshine and a beautiful view. （所给词的适当形式填空）

6 . 单句改错
1. The teacher and writer have written five books for teenagers.
2. Not only the Greens but also their daughter are leaving for New York by plane.
3. The problem is more and more young people are getting into the habit of smoking.
4. The reason why he failed in the exam was because he was too careless.
5. John dare not to say what he thinks.
6. The good news mustn’t be true.
7. Canada’s population is slight over thirty million.
8. I realized the book was intending for women in the countryside.
9. My father is satisfying with his life.
10. I'm very glad to see that your vocabulary is gradually building on.

7 . The house is more than 20 metres long and (测量) six metres in width.

8 . If you have any questions, don’t_________(犹豫) to ask me.

9 . You’d netter wear a pair of sneakers while________.

A．you working out

B．are working out

C．being worked out

D．working out

10 . 我发现我的大多数同学和老师都很友好、乐于助人。 (汉译英)