用所给词的适当形式填空。

1. My sister is a _____________ (dance), she _____________ well.

2. Does the woman _____________ (do) some _____________ (clean) in the evening?

3. The old men work on a farm , they are _____________ (farm).

4. Miss Li is a _____________ (sing), she often _____________ in English.

5. My mother is a _____________ (write), she _____________ books at home.

6. Marie Curie is a famous _____________ (science).