6. 參與;發(fā)揮作用        

5. 植樹        

4. 處于危險(xiǎn)中        

3. 業(yè)余時(shí)間        

2. 活到200歲        

1. 在電腦上        

4. Jim is going to swim this afternoon. (改為一般疑問句，并作肯定回答)

一        Jim        this afternoon?

—Yes,          .

3. I don't know how I can do better at school. (改為簡(jiǎn)單句) 

I don't know how           better at school.

2. We are going to play football next Saturday. (對(duì)畫線部分提問)

           you going to      next Saturday?

1. He is a doctor now. (用when he grows up改寫句子)

He           a doctor when he grows up.