专四专八

52、When I try to understand ________that prevents so many Americans from being as one might expect, it seems to me that there are two causes.

A.what it does

B.what it is

C.why it does

D.why it is

53、________can be seen from the comparison of these figures, the principle involves the active participation of the patient in the modification of his condition.

A.As

B.What

C.That

D.It

54、I am sure he is up to the job __ he would give his mind to it.

A.if only

B.in case

C.until

D.unless

55、We told you that he would come tonight,______.

A.didn't we

B.did we

C.would he

D.wouldn't he

56、The Social Security Retirement Program is made up of two mast founds, ________could go penniless by next year.

A.the larger one

B.the largest one

C.the larger of which

D.the largest of which

57、It's reported that by the end of the month the output of cement in the factory ________about 10%.

A.will have risen

B.has risen

C.will be rising

D.has been rising

58、George wasn't in class today.Professor Brown excused him __

A.of attending

B.from attending

C.to attend

D.attending

59、It is said that with more forests __ huge quantities of good earth are being washed away.

A.being destroyed

B.destroyed

C.destroying

D.to destroy

60、A safety analysis_______ the target as a potential danger. Unfortunately, it was never done.

A.would identify

B.will identify

C.would have identified

D.will have identified

61、Jean doesn't want to work fight away because she thinks that if she __ a job she probably wouldn't be able to see her friends very often.

A.has to get

B.had got

C.were to get

D.could have got

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