Has it been announced ______?A．when are the planes to take offB．that are the pla_刷题宝

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Has it been announced ______?

A．when are the planes to take off

B．that are the planes to take off

C．where are the planes to take off

D．when the planes are to take off

上一题下一题 0.64难度单项选择更新时间:2016-06-01 06:01:02

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