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).