单项选择题The work is easy for an expert ______ it is difficult for an inexperienced person.

A.because
B.therefore
C.while
D.unless


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A.finance
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A.catalogued
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A.alive
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A.at all
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A.for long
B.in and out
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10.单项选择题I could not persuade him to accept it. ______ make him see the importance of it.

A.If only I could not
B.No more than I could
C.Nor could I
D.Or I could not