．— Has Tom finished his report so far?
— I have no idea．He ______it this morning．
| A．did | B．has done | C．was doing | D．had done |
_____ the watch and see if you can find out what’s wrong with it.
| A．Pack up | B．Break down |
| C．Dig out | D．Take apart |
For some students, the computer serves only _____ a tool that is used to play games.
| A．of | B．in | C．as | D．to |
The parents are _____ their son who has been away from home for days.
| A．in search of | B．to search |
| C．searching | D．searched for |
—What do you think of the new movie directed by Jackie Chan?
—Well, most people think it is wonderful. But _____, it is just a new one, nothing special.
| A．pardon me | B．I agree |
| C．in my opinion | D．it is all right |
Persons under 18 _____ not be employed in night work in the US.
| A．can | B．may | C．will | D．shall |