1. 句型转换，每空一词。

1. （1） Was the machine invented by David?  She wasn't sure.（合并为一句）

   She wasn't sure the machine invented by David.

3. （2） How many kilometres are there from Shenzhen to Guangzhou? Please tell me.（合并为一句）

     Please tell me how many kilometers from Shenzhen to Guangzhou.

5. （3） I would rather look after the baby myself．（同义句转换）

     I look after the baby myself.

7. （4） You look nice in this yellow sweater. (同义句转换）

     This yellow sweater nice you.

9. （5） The girl didn't know where she could find her mother.（改为简单句）

     The girl didn't know where her mother.