----Do you know _______ young man under the tree?
----Yes, but only a little, maybe he is _______ university student.
| A．a; an | B．a; the |
| C．the; an | D．the; a |
When Jim's mother came in，he______ his homework.
| A．is doing | B．has done | C．was doing | D．did |
I saw Kai in the meeting room，he_______Jim for the school magazine.
| A．interviews | B．interviewed | C．has interviewed | D．was interviewing |
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 |