24. By the time we are 18 years old, most of us ________ middle school.

　 A. will finish　　　 　　 B. have finished　 　　 C. had finished　　 　　 D. will have finished

23. Once I ________ the tickets, I will call you and let you know.

　A. receive　　　　 　　　 B. will receive　　 　　 C. received　　　 　　 D. will have received

22. I think it is a waste of time ________ such a thing.

A. doing　　　　 　　 B. to do　　　　　 　　 C. done　　　　　　 D. did

21. He can’t _______ my job when I leave. He already has more than he can do.

　 A. take off　　　　　　 　　　　　　　　　　　　　　 B. take over

C. take up　　　　　 　　　　　　　　　　　　　　　　 D. take in

20. With more forests being destroyed, a huge quantity of good earth ________ each year.

　 A. is washing away　 　　　　　　　　　　　　　　　　 B. is being washed away

C. are washing away　 　　　　　　　　　　　　　　　 D. are being washed away

19. --- It’s burning hot today, isn’t it?

　 --- Yes. ______ tomorrow.

　 A. So will it　　　 　　 B. So it will　　　 　　 C. So it is　 　　　　　　 D. So is it

18. --- Must I turn off the gas after cooking?

--- Of course. You can never be _______ careful with that.

A. enough　　　　　　　　　 B. too　　　　　　　　　　　　 C. so　　　　　　　　　　　　　 D. very

17. They make ____a rule to do some running in the morning.

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

16. They will come _________ they’ve finished their homework.

　 A. immediately　　 　 B. suddenly　　 　　　　　 C. while　　 　　　　　　 D. quickly

15. We all find Peter hard to ______.

　 A. get on　　　 　　　　　 B. get along　　 　　　　 C. get along with　　 　 D. get with