問題詳情

The professor was working on her paper when the student ___________ on the door.
(A)knocks
(B)knocked
(C)knocking
(D)was knocking

參考答案

答案:B
難度:適中0.686099
統計:A(7),B(153),C(19),D(29),E(0) #
個人:尚未作答書單:The Body Shop

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