28. As is known to all, ______ great scientific achievements may have ______ positive effect on our life as well as society.

　 　A. /; a　　　 B. the; a　　　　 C. the; /　　　　　 　　　 D. /； /

27. These wild flowers are so special that I would do _______ I can to save them.

A. whatever　　　 B. that　　　 C. which　　　　 　 D. whichever

26. No effort should be _____ to make your dream ______.

A. made, come true B. spared, realize　 C. given, live　 D. spared, come true

25. The moment he ______ foot on his motherland, he couldn’t help _____ his bitter past.

A. set, think　 B. put, think of　 C. put, thinking　 D.set,thinking of

24. The two strangers are talking there as if they have much ________ and they ________ for many years.

A.　 in general, had been　　　 　 B. in common, were　

C. in common, had been　 　　　　 D. in general, were

23. When first written, the book _____ adults. How come that it is so popular ____ them?

A. didn’t mean for, with　　 　　 B. was never meant for, with

C. is never meant for, with　 　　 D. was never meant for, to　

22. It’s time that we ______ to bed. Let’s go and _______ Mum good night.

A. go, wish　 　 B. should go, say　 C. went, wish　 　 D. will go, hope

21. We don’t know what is ______ for us in future, so we should ______.

A. in store, get prepared　　　 　　　　　　　　　　　　　 B. waiting, get preparing　

C. expecting, get us prepared　 　　　　　　　　　　　　 D. happening, be prepared for

20. Practice makes ________.

A. interesting 　 B. smooth 　　　 C. successful 　　 D. perfect

19. --- How long will it take us to get there?

　 　--- That all ________.

A .depends　　　　 B .relies 　　　　　 C .speaks 　　　　 D .expects