31. Nelson Mandela _______ for over 27 years before he was set free.

　　　 A. had been put in prison　　　 　　　　　　　 B. had gone to prison

　　　 C. had been taken in prison　　 　　　　　　　 D. had been in prison

30. ----What happened to Bill that morning?　　

　 ----I saw him ________ into the manager’s office but was made ______ at once.

　 A. rush…leave　 　　　　　　　　　　　　　　　　　 B. rushing…to leave　　　

C. to rush…leaving　 　　　　　　　　　　　　　 D. rushing…leave

29. I _______ have used the computer without asking you first.

　 A. shouldn’t　 　　　 B. mustn’t　 　　　　 C. needn’t　　 　　　 D. can’t

28. Most animals and plants are ________ to large or sudden changes in temperature.

　　　 A. sensitive　　 　　　 B. sensible　　　 　　　 C. negative　　 　　　 D. positive

27. From about 1830 _____in the USA, European settlers began to move ______.

A. onward…westward　 　　　　　　　　　　 B. onwards…westwards　

C. onward… westwards　 　　　　　　　　　 D. onwards…westward

26. There are signs ______ a new, different South is coming out of its dark past.

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

25. In Brazil, Copacabana is known _____ the “Princess of the Sea”, while in Austria, Kitzbuhel is well known______ its many ski schools.

A. to…for　 　　　　　 B. for…as　　 　　　 C. as…for　　 　　　 D. as…to

24. It was during the “March on Washington DC” in 1963 _____ he gave the speech “I Have a Dream”, _____ inspired people of all races to fight for equality.

A. when…which　 B. that…which　 　　 C. when…that　 D. which…that

23. Because water is polar, it can _________both solids and gases.

　A. break out　　 B. break into　 　　　　　 C. break down　 D. break away

22. A: --- It’s ______ to rain.　　　 　 B: --- Let’s get the work _______ before the rain comes.

　 A. likely, done　 　　　　　　　　　　　　　　　　　　 B. possible, to be finished

C. probable, to be done　　　 　　　　　　　　　 D. likely, to be finished