I have many friends, ________ some are businessmen．

A．of them

B．from which

C．who of

D．of whom

Jim passed the driving test, ________ surprised everybody in the office．

A．which

B．that

C．this

D．it

－Maggie had a wonderful time at the party．

－________, and so did I．

A．So she had

B．So had she

C．So she did

D．So did she

Scientists say it may be five or six years ________ it is possible to test this medicine on human patients．

A．since

B．after

C．before

D．when

Brain told you that there wasn’t anyone in the room at this time, ________?

A．was there

B．wasn’t there

C．didn’t he

D．did he

We haven’t settled the question of ________ it is necessary for him to study abroad．

A．if

B．where

C．whether

D．that

I don’t think he is forty, ________?

A．do I

B．don’t I

C．is he

D．isn’t he

The news that they failed their driving test discouraged him, ________?

A．did they

B．didn’t they

C．did it

D．didn’t it

Let us take care of the house while you are away, ________?

A．shan’t we

B．shall we

C．will you

D．don’t you

There is no light in the dormitory．They must have gone to the lecture, ________?

A．didn’t they

B．don’t they

C．mustn’t they

D．haven’t they