根据中文提示，用词组的适当形式填空，每空一词。

1. 一What do you think of it?

     一I agree with you. My view is ________ _________(与……相似)yours.  

2. We must _______ ________(执行)the policy to control the population at once.

3. You have to do your homework carefully to avoid _________ ________ (犯错误).

4. There is ________ __________ (毫无疑问)that computers are widely used in business.

5. 一Where is Mr. Smith?

    一He has ________ _________(动身去)Hainan for a holiday．