the plan will arrive on schedule remains unkonwn
the plan will arrive on schedule remains unkonwn
A.if Bthat Cwhether Dwhen
the plan will arrive on schedule remains unkonwn这句子不是已经完整了么?可以用that啊,为什么用whether啊?
A.if Bthat Cwhether Dwhen
the plan will arrive on schedule remains unkonwn这句子不是已经完整了么?可以用that啊,为什么用whether啊?
英语人气：762 ℃时间：2020-02-05 10:09:52
优质解答
因为有remains unkonwn.
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