答案：independence

13. Even though what he said is true, there is no need for us to be 　　　　　(担忧).

答案：worried

14. She was 　　　　　　　(恼火)with me for having said the wrong thing.

答案：annoyed

15. 图书馆禁止这些书被带出。

答案：The library forbids these books to be taken out.

16. 对我来说, 这是一项富有挑战性的任务。

答案：This is a challenging task for me.

17. 我们在老师的指导下完成了工作。

答案：We finished the work under the guidance of our teacher.

18. 我们应该学会平衡学习和乐趣。

答案：We should learn to balance study with/and pleasure.

二、用方框中所给短语的正确形式填空

as if　stay up　mix up　set a limit on　every time　along with　at present　insist on

1. No wonder you have 　　　　　　the two boys;they are twin brothers.

答案：mixed up

2. Most young people prefer to 　　　　　　late at night and sleep late in the morning.

答案：stay up

3. He, 　　　　　　 his parents, would like to go to the Summer Palace.

答案：along with

4. There is nothing interesting going on here 　　　　　　.

答案：at present

5. They talked 　　　　　　they had been friends for ages.

答案：as if