句型转换。
1. He is a singer. (转换成疑问句)
____________ a singer?
2. She is my cousin. (对划线部分提问)
__________ this woman?
3. Who are these people? (对划线部分作回答)
___________ my grandparents.
4. She is a police office. (对划线部分提问)
_____ is her _____?
5. Is she a dancer? (转换成陈述句)
_____________ a dancer.