13.　 (　 )There are so many kinds of sports shoes. I can’t decide_____.

A.　　 to buy which　 B. what to buy　 C. which to buy　 D. to buy what

12.　 (　 )More than one thousand students ________this kind of exam in the _____ few years.

A. have pasted ; passed　 B. have passed ; past　 C. passed ; past　 D. past ;past

11.　 　(　 )It is necessary _______ you _____ English as often as you can.

A. for ;to read　 B.　 of ; to read　 C.　 to ; to reading　 D.　 of ; reading

10.　 (　 )Eddie is lazy enough _____ all day without _____.

A. to asleep; moving　 B. to sleep ; to move　 C.　 to sleep ; moving　 D.　 sleeping ; to move

9.　　　 (　 )The Turners ______ the idea of buying the piano because it’s too expensive.

A. gave up　 B. gave away　 C.　 gave out　 D. gave in

8.　　　 (　 )Mr. Wu _____ this math problem ______ him many times, but he still doesn’t understand it.

A. explains ; to B. have explained ; for C. explained ; with D. has explained ; to

7.　　　 (　 )My brother bought a computer yesterday. He wants to learn to use it to help himself get ______ than before.

A. much organized　 B. little organized C. more organized D. less organized

6.　　　 (　 )Lei feng is so thoughtful that he thinks of others first___________.

A. at a time　 B.　 at all times　 C.　 at the time　 D. at one time

5.　　　 (　 )I want to go to the doctor’s, but you ______ with me. Which answer is incorrect?

A. need not to go　 B. don’t need to go C. need not go D. don’t have to go

4.　　　 (　 )We must run, _____ we will miss the train.

A. so　 B. otherwise C. though　 D. but