1．The girl is often heard  _______________（sing） in the next room.

2．_____________ （wait） for him for so long made me very angry.

3．I ___________ （make） quite a few friends by the end of last term.

4．Could you please _________________（not speak） so loud?

5．You should say " Thank you" when you ____________（ give ） something as a present.

6．David preferred _____________（sell） newspapers to doing the housework when he was young.

7．—You were not at home when I called you yesterday.

  —No, we weren't. We_______________ （drive） home on the highway.

8．Mrs. Green made Alice _______________（sweep） the floor after supper.

9．I don't know it good or bad for us _______________（watch） TV too much.

10．We had to put off ______________（visit） my grandma because my mother was ill.