1 . ______ the rain yesterday，we _____ such fresh air now．

A．Were it not for; couldn’t enjoy

B．Had it not been for; couldn’t enjoy

C．But for; can’t have enjoyed

D．Without; couldn’t have enjoyed

2 . —What do you think of a house supplied by Lovell?
—         you buy a home from Lovell，the company promises to buy it back at the same price after three years.

A．Should	B．Must
C．Could	D．Would

3 . ______ a little earlier, you could have got a copy of his latest book.

A．If you would arrive	B．If you arrived
C．Should you arrive	D．Had you arrived

4 . ________the problem, he wouldn't have committed those mistakes.

A．If he understood

B．Had he understood

C．When he had understood

D．If he would understood

5 . —It’s a pity that Andrew didn’t want to go to the conference.
—________ willing to go, we could have paid all his expenses.

A．Had he been	B．Being
C．Was he	D．He had been

6 . What would have happened ________，as far as up to the river bank.

A．Bob had walked farther

B．if Bob should walk farther

C．had Bob walked farther

D．if Bob walked farther

7 .        it rain tomorrow, we would have to call off the hike.

A．Will

B．Would

C．Should

D．Were

8 . The sleeping baby would be scared _______ a sudden loud noise.

A．was there	B．there was
C．should there be	D．there should be

9 . ________ you happen to see Mary, would you please ask her to come here?

A．Would

B．Could

C．Should

D．Might

10 . ________ for the fact that she broke her leg, she might have passed the exam.

A．Hadn’t it been

B．Had it not been

C．Was it not

D．Were it not