[題目] 怪物 閱讀 P227

作者: QoiiwWe (G)   2016-08-25 14:47:11
書名:怪物講師
版本:2013版
頁數:p227
題目:
passengers are reminded to remain quiet ____ there is an announcrment from the pilot.
(A) whether
(B) whom
(C) whenever
(D) wherever
疑問:答案是C,請問為甚麼A不能選?

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