【題目】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。

考查動名詞做主語用法。wear是動詞原形;wore是過去式;wearing是動名詞或現(xiàn)在分詞形式;worn是過去分詞。判斷句子結(jié)構(gòu),謂語動詞是can be helpful,可知缺主語,動詞做主語需要變?yōu)閯用~。故選C

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