【題目】On Taobao, customers________return goods if there are no questions asked, but they________pay delivery(快遞) costs.

A.can't; canB.must; mustC.can; have toD.mustn't; can

【答案】C

【解析】

句意：在淘寶，顧客可以無理由退回商品，但是他們必須付快遞費(fèi)用。

考查情態(tài)動詞。can’t不能；can能；must必須；mustn’t禁止；have to不得不。第一空表達(dá)“能夠退貨”用情態(tài)動詞can，表示可以無理由退貨；第二空表示“不得不付快遞費(fèi)用”用have to。故選C。

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