50．–Do you know our town at all?　 --No, this is the first time I _______ here.

A. was　　　 B. have been　　　 C. came　　　 D. am coming

49．This is the largest rooms ________ I’ve ever slept in.

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

48．John was the only one _______ went to the meeting on time.

A. which　　　 B. that　　　　 C. whom　　　　 D. who

47．Let A B C a triangle _______ sides are of unequal length.

A. that　　　 B. which　　　　 C. whose　　　　 D. of which

46．The visitors saw rows of houses of roofs _________ are red.

A. on which　　　 B. of which　　　 C. where　　　　 D. that

45．China has hundreds of islands, ________ is Taiwan.

A. the largest of which　　　　　 B. of which largest

C. which the largest　　　　　　 D. in which the largest

44．There is a mountain _______ the top is always covered with snow.

A. of that　　　 B. of which　　　 C. its　　　 D. that

43．–Why _____ ask the teacher to explain this math problem?　 --I think _____ to work it out by ourselves.

A. not; better　　　　　　　　 B. don’t we; it better

C. do you not; us better　　　　 D. don’t you; we’d better

42．–How many hours do you think the lecture ______?　 --Oh, it’s hard to say.

A. last　　　 B. will be lasted　　　 C. will last　　　 D. has been lasted

41．–Could you lend me _______ ink?　 --Sorry, I have only ______ myself.

A. a little; some　　 B. any; some　　 C. some; a little　 D. little; little