It is rude for the young to make fun of their elders.

年轻人取笑长辈是很粗鲁的行为。

It's foolish of you to waste money.

你浪费钱，真傻。

活学巧用

4.单项填空

（1）_________is true that English is being accepted as an international language.

A.There B.This

C.That D.It

答案：D

（2）It's strange that they _________ nothing about this matter.

A.know B.would know

C.knows D.knew

提示：在It is natural/necessary/strange/important...等结构后的主语从句中，用虚拟语气，谓语动词用"should do"形式，should可以省略。

答案：A

（3）The Foreign Minister said，"_________ our hope that the two sides will work towards peace."

A.This is B.There is

C.That is D.It is

提示：it为形式主语，that从句是主语从句。

答案：D

5.wait for sb.to do sth.

等待某人做某事；期待某人做某事

【典型例句】

I am waiting for my mother to come home.

我在等妈妈回家。

I will wait for you to reply.

我会等你的答复。

The children were waiting for the film to begin.

孩子们正在期待电影开始。

【相关链接】

wait one's chance 等待时机

wait one's turn 等轮到自己

wait orders 听候命令

活学巧用

5.1）单项填空

（1）Can you wait for me _________the work?

A.finish B.finished

C.finishing D.to finish

提示：句意为："你能等我完成工作吗？"