1. ––I find it very difficult to read ______ novel you lent me last week.

––Yes. It is necessary to have ______ good knowledge of history.

A. the; /     B. a; /       C. the; a       D. a; a

2. ––I will give Bob a ring.

––You _______. You haven’t been in touch with him for ages.

A. will         B. may      C. have to       D. should

3. If the weather had been better, we could have had a picnic. But it ______ all day.

A. rained        B. rains       C. has rained        D. is raining