Do you think ________ necessary to take the second turning? [ ]A. hi

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Do you think ________ necessary to take the second turning?         [     ]
A. him
B. it
C. I
D. that

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举一反三

She finds _____ interesting to play with this dog.
A. that
B. it
C. one
D. this

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I think the snow will make _____ difficult for us _____ the way back home. [ ]
A. that; to find
B. it; to find
C. that; find
D. it; find

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_____ that they enjoyed the game very much. [ ]
A. I seemed
B. It seemed for me
C. I seemed to know
D. It seemed to me

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_____ hard to say whether it"s good or bad to clone human beings, I think.
A. It
B. This is
C. That"s
D. It"s

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_______ will take John one year to finish the plan.[     ]
A. Tom
B. she
C. It
D. who

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