1 . —Was Sun Yang sorry for his driving without a license?
—Yeah, he said he ________ a role model as a public figure but he failed to be.

A．was	B．had been
C．should have been	D．would be

2 . If he had known he was building his own house, he ________ all of it so differently.

A．would do	B．would have done
C．could do	D．must have done

3 . —Did you make it at last?
—Yes. But for your help, it________a serious loss.

A．would cause	B．must have caused
C．would have caused	D．may cause

4 . Had they known that there was an explosion in Thailand, they          second thoughts about traveling there.

A．may have	B．could have
C．will have had	D．might have had

5 . —The accident might not have happened, had we been more careful.   
—But we ______.

A．weren’t

B．didn’t

C．hadn’t

D．don’t

6 . I was caught in a traffic jam for over an hour, otherwise I _________ you waiting for such a long time.

A．will not keep	B．have not kept
C．had not kept	D．would not have kept

7 . Had he worked harder, he ________the exam.

A．must have got through	B．would have got through
C．would get through	D．could get through

8 . -- If you _____ away our secret that day, the current situation _____ different.
-- Sorry, but _____ to do that.

A．didn’t give; will be; didn’t mean

B．hadn’t given; would be; didn’t mean

C．hadn’t given; would have been; hadn’t meant

D．shouldn’t give; is; don’t mean

9 . It was Mr. Zhang that helped us out of the trouble. Without his help, we ______ it so easily.

A．can’t manage	B．mustn’t have managed
C．couldn’t have managed	D．couldn’t manage

10 . I________through that bitter period without your generous help.

A．couldn't have gone	B．didn't go
C．wouldn't go	D．hadn't gone