3. 在学习之余，他就参加给需要帮助的孩子筹集书籍之类的活动。

When he is free,he activities like books for children.

2. 带上地图吧，不然你会迷路的。

Please take a map with you,or you’ll  .

1. 小时候，我弹不好钢琴。

When I was young. I   well.

4. At last the firemen stopped the fire from burning.(同义句转换)

 At last the firemen the fire.

3. My parents often get my letter once a week.(同义句转换)

 My parents often  once a week.

2. Jack could speak English well when he was 5.(同义句转换)

 Jack  speak English well   five.

1. What can superman man?(同义句转换) 

What supermarket do?

10. Spring is coming. We are looking forward to (go) out for a picnic.

9. What will Jessie do when she (be) free?

6.—Who first (think) of the idea? —Daniel did.

7. How dangerous the plan (sound) !