42. Had he worked harder, he _D_ the exams.
A must have got through B could get through
C would get through D would have got through
had he worked harder = if he had worked harder
与过去事实相反用:情态动词 + have + 动词的过去分词。
45. It seems oil _B_ from this pipe for some time. Well have to take the machine apart to put it right.
A had leaked B has been leaking C leaked D is leaking
for + 一段时间,做时间状语,谓语动词用完成时态。过去完成时要与一般过去时搭配。
46. When he arrived, he found _C_ the aged and the sick at home.
A nothing but B none other C none but D no other than
形容词前加the表示一类人。 none but 只有,仅有。
47. The pressure _B_ causes Americans to be energetic, but it also puts them under a constant emotional strain.
A competing B to compete C to be competed D having competed
the right to vote 选举权。 动词不定式作后置定语要用主动形式。
the pressure to compete 竞争的压力。
49. As teachers we should concern ourselves with what is said, not what we think _C_.
A have to be said B must say C ought to be said D need to say
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