1. He started playing the piano six years ago. （就划线部分提问）

  ______ ______ he ______ playing the piano?

2. They have been living in the city since they were born. （一般疑问句）

  _____ _______ ______ living in the city since they were born?

3. Would you mind putting out your cigarette? （同义句）

  ______ you _______ _______ out your cigarette?

4. You should get her some flowers for her birthday. （就划线部分提问）

  ______ ______ _______ get her for her birthday?

5. They didn’t watch TV yesterday. They read books instead. （合并成一句）

  They read books instead _______ _______ TV yesterday.

6. Coughing loudly in public isn’t polite. （改为同义句）

  It isn’t ______ ______ _______ loudly in public.

7. I’ve been studying computer science since three years ago. （改为同义句）

  I have been studying computer science _______ _______ ______.