54.Was_____that I saw last night at the concert?

A.it you　　　　 B.not you　　 C.you　　　 D.that you

53.It ____ you that ____ to blame.

A.is;is　　　　 B.is; are　　　 C.are;are　　 D.are;is

52.It is the ability to do the job ____ matters not where you come from or what you are.

A.one　　　　　 B.that　　　 C.what　　　 D.it

51.It was only when I reread his poems recently____ I began to appreciate their beauty.

A.until　　　　 B.that　　　 C.then　　　 D.so

50.I hate ____ when people talk with their mouths full.

A.it　　　　 B.that　　　　 C.these　　　　 D.them

49.It was about 600 years ago___the first clock with a face and an hour hand was made.

A.that　　　　 B.until　　　 C.before　　　 D.when

48.I hope there are enough glasses for each guest to have _____.

A.it　　　 B.those　　　 C.them　　　 D.one

47.____is a fact that English is being accepted as an international language.

A.There　　　 B.This　　　 C.That　　　 D.It

46.The weather turned out to be very good, ___ was more than we could expect.

A.what　　　 B.which　　　 C.that　　　 D.it

45.Tom’s mother kept telling him that he should work harder, but ____ didn’t help.

A.he　　 B.which　　　 C.she　　　 D.it