11. He did not regret saying what he did but felt that he _____ it differently.

　 A. could express　　　　　　　　　　 B. would express　　

C. could have expressed　　　　　　 D. must have expressed

10. If a person has not had enough sleep, his actions will give him ____ during the day.

　 A. away　　　　　 B. up　　　　　　 C. in　　　　　　 D. back

9. I __________ the Christmas gift by mail because he came home during the Christmas holidays. A. ought to have sent　　　　　　 B. couldn't have sent C. must have sent　　　　　　　　 D. needn't have sent

8. It is predicated that existing reserves of fossil fuel ______ by 2045. A. have been run out　　　　　 B. are going to be run out C. will have run out　　　　　　 D. have run out

7. As the train will not leave until one hour later, we __________have a drink at the cafe.

A. may well　　　　 B. just as well　　　 C. might as well　　　 D. as well

6. Scientists think ______ helps some trees to conserve water in the winter. A. when losing leaves 　B. leaves are lost 　C. that losing leaves 　D. the leaves lost

5. __________in the past, at the moment it is a favorite choice for wedding gown. A. Unpopular has as white been　　　 B. White has been as unpopular C. Unpopular has been as white　　　 D. Unpopular as white has been

4. He never hesitates to make _____ criticisms ______ are considered helpful to others. A. so, that　　　　　 B. so, as　　　　　 C. such, that　　　 　D. such, as

3. The sale usually takes place outside the house, with the audience __________ on benches, chairs or boxes. 　 A. having seated　　　 B. seating　　　　　 C. seated　　　　 D. having been seated

2. ______there is little we can do to modify the weather, we can at least know what kind of weather to expect. 　 A. Since　　　　　 B. When　　　　　　 C. While　　　　 D. Unless