21. It’s time___about the pollution problem in the city.

　　A. everything is done

　　B. anything will be done

　　C. nothing to be done

　　D. something was done

　　22. Bob tried in vain to talk his little brother ___some money from their mother’s purse.

　　A. to steal

　　B. to stealing

　　C. into stealing

　　D. into steal

　　23. When I saw Jane, I stopped and smiled, but she___me and walked away.

　　A. refused

　　B. ignored

　　C. denied

　　D. missed

　　24. Little___the danger he is in.

　　A. he realizes

　　B. he has realized

　　C. does he realize

　　D. he does realize

　　25. The book lists the phenomena and explains the reason___.

　　A. as well

　　B. only

　　C. excessively

　　D. as well as

　　26. Parents love their children with a devotion ___ no return.

　　A. which they ask for

　　B. for which they ask

　　C. for which they ask for

　　D. which they ask

　　27. If you had come here yesterday, you ___him.

　　A. would see

　　B. would have seen

　　C. saw

　　D. had seen

　　28. ___alone, I turned on the radio for company.

　　A. Be

　　B. Been

　　C. Being

　　D. Having been

　　29. I don’t expect you ___the exam again.

　　A. fail

　　B. to fail

　　C. failing

　　D. to be failed

　　30. It___ him only half an hour to finish his homework, and he ___ most of the evening watching TV.

　　A. cost, paid

　　B. took, used

　　C. took, spent

　　D. used, spent