24. "_____ of them are not here." means "_____ of them are not here."

A. All; Some B. Both; Every C. Both; Neither D. All; Both

23. We must do something to _____ factories _____waste water into the river before it is cleaned.

A. stop; pouring . B. prevent; to pour C. keep; pouring D. stop; to pour

22. What way are you thinking of _____ rid of the flies?

A. to get B. getting C. being got D. to be getting

21. Jack is a good friend _____, he often comes to our home for a visit.

A. of my father B. of my father's C. for my father D. with my father

20. You can say "He went there _____, not _____."

A. on the car; by car B.on foot; in his car C. by foot; by car D.in his car; by his foot

19. I come to tell you Jack _____ for London next month.

A. is leaving B. is about to leave C. will leave D. would leave

18. --They all agree _____ George. Has the project been passed?

--Who _____ George can make the final decision?

A. except; expect B. except; besides C. but; but D. besides; but

17. We are just _____ calling you up _____ you come in.

A. about; when B. on the point of; while C. on the point of; when D. on the point of; as

16. --How often do you go to the library?--______.

A. In two days B. Every few days C. Each third day D. Every a few days

15. I can't understand it, will you please _____ once more?

A. explain that word B. repeat that word　 C. explain us that word D. explain that word for us