北京2010年成人英語三級考試模擬試題及答案(5)

　　21. I believe it is one of the best books _______ written on the subject.

　　A. that have ever been B. which have ever been

　　C. that has ever been D. which has ever been

　　22. This is a very _______ issue and we haven’t figured out a way to deal with it yet.

　　A. competent B. compound C. comprehensive D. complicated

　　23. Mary helped Bill whenever he was in trouble but he never did anything for her _______.

　　A. in turn B. in advance C. in return D. in vain

　　24. Can you tell the _______ difference between the two words?

　　A. slender B. single D. slight D. simple

　　25. The _______ of the movie is so great that many people want to see it.

　　A. attack B. attraction C. attempt D. attention

　　26. The old man, _______ poor, could not afford a decent meal.

　　A. being B. is C. was D. has been

　　27. Our sportsman won the race ______ at the Olympics.

　　A. with easiness B. in ease C. with ease D. at

　　DCCB

　　26-30 ACAAC