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【题目】It's impolite ____information directly when asking for help.
A.ask
B.asking
C.to ask

【答案】C
【解析】句意:当你寻求帮助时,直接询问信息是不礼貌的。此句中的it是形式主语,后面用动词不定式作真正的主语。所以答案是C。

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