—Would you like to go to see Liu Qian’s magic?
--I’d like to, _____ you don’t want to go alone.
| A．before | B．after | C．until | D．if |
I_______ my homework when my mother________back.
| A．is doing；came | B．was doing；come |
| C．was doing；came | D．is doing; is coming |
My mouth was watering________I watched the TV program A Bite of China.
| A．when | B．before | C．since | D．after |
She_______ to an English program while her parents________TV.
| A．was listening；is watching | B．listened；were watching |
| C．was listening；watched | D．was listening；were watching |
—What were you doing when we were dancing yesterday afternoon?
—I_______ the classroom.
| A．was cleaning | B．have cleaned | C．will clean | D．clean |
Little Tom_________ computer games when his father got home.
| A．is playing | B．plays | C．was playing | D．played |