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So little known _____ that soldiers had to ask for a guide.
A．by this earthquake - stricken area
B．this earthquake - stricken area
C．was this earthquake - strcken area
D．this earthquake - stricken area had been

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For a moment nothing happened. Then ___ all shouting together.
A．voices had comeB．came voices
C．voices would comeD．did voices come

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----- As we know, you won’t go back to the USA since you have established a research center here．But how long _____ in America?
----- For almost 10 years．
A．did you studyB．have you studied
C．were you studyingD．have you been studying

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----- Would you mind helping me with my suitcase? I really can’t manage it by myself．
----- ________．
A．My pleasureB．No problemC．Not at allD．Never mind

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---I think sometimes watching TV will cause visual pollution to the teenagers．
---_________．
A．Good idea!B．The same to you
C．With pleasureD．I can’t agree with you more

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I don’t imagine Russ and his poor dog had a good time on the deserted island, _____?
A．didn’t theyB．do IC．did theyD．hadn’t they

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– How long _____ in this job?             – Since 1990.
A．were you employedB．have you been employed
C．have you employedD．will you be employed

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The stranger isn’t like a worker, nor _____ a salesman.
A．he is likeB．he looks likeC．does he likeD．is he like

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______myself to my study,1 would be sitting in a comfortable office now．
A．If I devotedB．Should I devoteC．Would I devoteD．Had I devoted

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______has the children burdened with too much homework nowadays?
A．It is who thatB．Who is it that
C．It was who thatD．Who was it that

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