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The problem is difficult .A.to be doneB.to be worked outC.to work outD.to doing

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The problem is difficult .A.to be doneB.to be worked outC.to work outD.to doing

The problem is difficult ________.

A.to be done

B.to be worked out

C.to work out

D.to doing

试题答案

C

不定式短语在句中作状语，修饰表语形容词，不定式与主语构成逻辑上的动宾关系，动词不定式不用被动式．

标签：difficulttobetheproblem

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