15. It is very 　　　　　of you to notice that detail straightaway．

　 A．sharp　　 B．enthusiastic　　 　C．eager 　　D．aware

14. The fact that smoking is harmful to health is ________ most smokers admit． 　 　A．what　　　　　　　 B．which　　　　　　 　C．where　 　　　 D．that

13. -Dad! Tom's broken a glass!

- ________. Accidents will happen.

A. No way　　　　 　　　　B. Doesn't matter　　　　

C. No trouble at all　　 　　D. Don't mention it

12. It seems that living green is ______ easy and affordable. A small step makes a big difference.

　 A. exactly　　　　 B. fortunately　　　 C. surprisingly　　　 D. hardly

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