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

【答案】C
【解析】句意：當(dāng)你尋求幫助時(shí)，直接詢(xún)問(wèn)信息是不禮貌的。此句中的it是形式主語(yǔ)，后面用動(dòng)詞不定式作真正的主語(yǔ)。所以答案是C。

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