I ________ my homework while my parents           TV last night．

A．did; have watched                        B．was doing; were watching

C．had done; were watching                   D．would do; were watching

(2006年南京)

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

[　　]

A．did; have watched

B．was doing; were watching

C．had done; were watching

D．would do; were watching