20. Whether ways will be found to stop pollution or not is just _______ worries the public.

A. what　　 B. which　　　 C. that　　　 D. why

19. It kept on raining heavily for a whole week. _______, we have big floods all around our town.

A. After all　　　 B. Even though　　　 C. However　　　 D. As a result

18. -Many books are on sale in the supermarket at _____ prices.

　-Let’s go and buy some, OK?

A. attractive　　 B. original 　　 C.　　 common　　 D. adaptable

17. Too much work and too little rest often _____ illness.

A. brings in　　 B. gives in 　　 C. leads to　　 　 D. owes to

16. _______ people like "English on Sunday".

A. Tens of thousands　　　　　　　　　　 B. Tens of thousands of

C. Ten thousands of　　　　　　　　　　　 D. Tens and thousands of

15. It is necessary for us to save electricity because we are _______ it.

A. short for　　　 B. short of　　　 C. short with　　　 D. short off

14. The chairman thought _____ an honour to invite Professor White to speak at the meeting.

A. that　　　　 B. this　　　　 C. it　　　 D. him

13. The purpose of new technologies is to make life easier, ____ it more difficult.

A. not make　　　 B. not to make　　 C. not making　　 D. do not make

12. –Will you give this message to Mr. Smith, please?

--Sorry, I can’t. He ____ .

A. doesn’t any more work here　　　 B. doesn’t any longer work here

C. doesn’t work any more here　　　 D. doesn’t work here any more

11. If you don’t take away all your things from the desk, there won’t be enough ____ for my stationery.

A. area　　 B. place　　 C. surface　　 　D. room