問題詳情
12. At the beginning of class, the noise of desks _______could be heard outside the classroom.
(A)opened and closed
(B)to be opened and closed
(C)beingopenedandclosed
(D)to open and close
(A)opened and closed
(B)to be opened and closed
(C)beingopenedandclosed
(D)to open and close
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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