問題詳情
7.Tom was about to close the windows_____his attention was caught by a bird.
(A) when
(B) if
(C) and
(D) till
(A) when
(B) if
(C) and
(D) till
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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