句型转换。

1. They are doing their homework now. (提问划线部分)

    _____ are they doing now?

2. Let's go to the Great Wall, _____ _____ (完成反意疑问句)

3. They had a math test last week. (用next替换last改写句子)

    We _____ _____ a math test next week.

4. She is babysitting her sister for vacation. (提问划线部分)

    _____ she _____ for vacation?

5. The boy is doing his homework after school. (提问划线部分)

    _____ _____ the boy _____ after school?