The patient suffering from a cough soon found ______ to give up smoking.A、it is

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问题 The patient suffering from a cough soon found ______ to give up smoking.

选项 A、it is necessary
B、necessary
C、it necessary
D、that necessary

答案 C

解析句型结构。it 在句中是形式宾语，代替不定式短语to give up smoking，不能省略。因此选择C。

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Thepatientsufferingfromacoughsoonfound______togiveupsmoking.A、itis