1. 句型转换。（每空一词）

1. （1） I did my homework at home yesterday. (改为否定句)

   I my homework at home yesterday.

3. （2） Lucy sang a Chinese song at her birthday party. (改为一般疑问句)

   Lucy a Chinese song at her birthday party?

5. （3） I had a good time in Beihai Park last week. (改为同义句)

   I in Beihai Park last week.

7. （4） Our school art festival was very nice. (对划线部分提问)

   your school art festival?

9. （5） Lucy and Lily sang English songs and performed ballet at the party. (对划线部分提问)

   Lucy and Lily at the party?