56．I usually take a nap after lunch, ____ is my habit.

A. which it　　　　 B. as it　　　　 C. as　　　　 D. that

55．That old man had three sons, all of _______ died during the last earthquake.

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

54．The number of visitors, ______ we had expected, was well over two hundred.

A. that　　　　 B. where　　　　 C. who　　　　　 D. as

53．Which of the two cows ________ you keep produces more milk?

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

52．Who ________ knows him would believe him?

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

51．All _______ I needed is a supply of oil.

A. the thing　　　 B. what　　　　 C. which　　　　 D. that

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