I ______ my homework while my parents ______ TV last night.

1. A.
   did；have watched
2. B.
   was doing；were watching
3. C.
   had done；were watching
4. D.
   would do；were watching

I was doing my homework while my parents __________ TV last night.

I was listening to pop songs while my parents ________ dinner yesterday.

A. were cooking????????????? ????????????? B. cooked????????????? ????????????? C. have cooked????????????? D. had cooked

 I ________ my homework while my parents ________ TV at 9 last night.

A. did; have watched                         B. had done; were watching

C. was doing; were watching                 D. would do; were watching