题目内容


. As a teacher, he has never given his students so difficult a problem ____ they can’t work out.
A．ifB．thatC．whenD．As
D
略
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Tired _______ he was , he decided not to trouble her.
A．asB．althoughC．unlessD．even if
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A．whileB．ifC．whenD．whether

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A．whichB．whatC．thatD．whose

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A．and, andB．or, orC．and, orD．or, and

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A．so thatB．even ifC．as long asD．in case

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A．that; what; allB．what; that; that
C．that; that; thatD．what; that; what
I had hardly sat down_____ the telephone rang
A．than B．whenC．as D．after

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A．whichB．whenC．whereD．That

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