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【题目】In spring, a mask can be helpful if flowers make your nose uncomfortable.

A.wearB.woreC.wearingD.worn

【答案】C

【解析】

句意:在春天,如果花使你的鼻子不舒服,戴口罩可能有用。

考查动名词做主语用法。wear是动词原形;wore是过去式;wearing是动名词或现在分词形式;worn是过去分词。判断句子结构,谓语动词是can be helpful,可知缺主语,动词做主语需要变为动名词。故选C

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