1. 根据句意及汉语提示补全句子

1. （1） They will learn a lot from these （活动）.

3. （2） Can “（鸟）flu” be treated now?

5. （3） The (商人) was truthful and without deceit（狡诈）.

7. （4） I （想知道）what that means.

9. （5） Who would know the （差别）?

11. （6） You carry an （伞）. You watch the weather channel (频道).

13. （7） My friend was (饥饿的), so we drove to a shopping mall to get some food.