摘要： Has it been announced the planes are to take off? A. when B. what C. where D. who
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Has it been announced ________ the planes are to take off?
A. when
B. if
C. which
D. what
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网址：http://m.1010jiajiao.com/timu3_id_3030701[举报]
Has it been announced ________ the planes are to take off?
A. when
B. if
C. which
D. what
查看习题详情和答案>>