4. you , are , in , in , writing , interested , English?

答案：Are you interested in writing in English?

3. extra , needs , son , my , English , lessons.

答案：My son needs extra English lessons.

2. how , has , he , long been , swimming?

答案：How long has he been swimming?

1. I , I , was , have been , since , skating , ten years old.

答案：I have been skating since I was ten years old.

A. When did you start to do that?

B. It’s difficult to say. When I was young ,my parents bought some for me as presents.Some of them are lost. But some are still kept by me.

C. I’d like to collect toy animals , like toy bears , dogs , sharks and so on.

D. Nothing. What about you?

E. What would you like to collect?

1.___________2.___________ 3.___________4.___________5.___________

答案：EDCAB

5. Would you like to visit the Summer Palace if the rain ______(stop) tomorrow?

答案：stops

解题点拨：参看本大题第4题的点拨。

4. If Alice __________ (come) back ,please give it to her.

答案：comes

解题点拨：if 引起了一个条件状语从句，在从句中，要用一般现在时来表示将来的动作，要填comes。

3. How long has your mother ____________(teach) math at this school?

答案：been teaching/taught

解题点拨：参看本大题第1题的点拔。另外，这里也可以用现在完成时，即have/has+现在分词的结构来表示。

2. My hobby is __________(collect) all kinds of stones(石头).

答案：collecting/to collect

解题点拨：本题is后面接表语，可用动名词短语，也可用不定式短语来表示。

1. The football match ________(go) for fifteen minutes.

答案：has been going

解题点拨：足球赛进行了15分钟，表示动作在现在以前的一段时间里一直在进行，共计15分钟。用现在完成进行时。