1. 将下列句子合并为宾语从句

1. （1） What is Tom good at? Can you tell me?

     Can you tell me   good at?

3. （2） I want to know．Can they go camping next Sunday?

     I want to know    they can go camping next Sunday．

5. （3） Why does she come here? I don't know．

     I don't know   here．  

7. （4） When did he buy this book? Do you know?

     Do you know   this book?

9. （5） Did Sally tell you? She won the competition．

     Did Sally tell you   the competition?