Keys _______ opening the lock in the door.

A. used for???????? B. are used?????? ????????????? C. are used to???? ????????????? D. are used for

 

【答案】

D

【解析】

試題分析：句意：鑰匙是用來(lái)開門上的鎖的。A結(jié)構(gòu)不完整，故錯(cuò)誤。B be used to do 被用來(lái)做……，單選項(xiàng)不完整，故不正確。C be used to do 被用來(lái)做···，to后加動(dòng)詞原形，結(jié)合句子結(jié)構(gòu)也不正確Dbe used for doing sth,被用來(lái)做……。故選D。

考點(diǎn)：考查詞義辨析。

 

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