句型转换（一空一词）。
1. His name is Li lei.(改为同义句)
_____________ _____________ Li Lei.
2. David is in his room.(对划线部分提问)
_____________ _____________ David?
3. They are my cousins.(改为一般疑问句)
_____________ they _____________ cousins?
4. I like salad for lunch. (对划线部分提问)
_____________ _____________ you like for lunch?
5. He can not help kids with swimming. (改为同义句)
He _____________ _____________ kids _____________.
6. Thank you for your letter. (改为同义句)
_____________ _____________ your letter.
7. My birthday is January 10th. (对划线部分提问)
_____________ _____________ your birthday?
