問題詳情

40. The key ________ open this door. Remember to carry it with you when going out.
(A)used to
(B)is used
(C)is used to
(D)used

參考答案

答案:C[無官方正解]
難度:適中0.526316
統計:A(10),B(6),C(20),D(1),E(0)

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