The early train is __ to leave at five in the morning.You'd better get to the station __5:30 at latest.A.due;by B.sure ;around问:A中的by什么用法?B为什么不对

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Theearlytrainis__toleaveatfiveinthemorning.You''dbettergettothestation__5:30atlatest.A.due;byB.sure;a

The early train is __ to leave at five in the morning.You'd better get to the station __5:30 at latest.A.due;by B.sure ;around问:A中的by什么用法?B为什么不对
The early train is __ to leave at five in the morning.You'd better get to the station __5:30 at latest.
A.due;by B.sure ;around
问:A中的by什么用法?B为什么不对

The early train is __ to leave at five in the morning.You'd better get to the station __5:30 at latest.A.due;by B.sure ;around问:A中的by什么用法?B为什么不对
due:(车船)预定应到的;预期 sure:确定的
The early train is due to leave at 5 in the morning.You'd better get to the station by 5:30 at latest.早班火车预计早上5点发车,你最迟5:30分要到火车站.
by:到 by 5:30 到5:30分 是指5:30分这个点
around:大约,左右 around 5:30 可以是5;30之前,也可以是5:30之后,句子的意思是火车预计5点发车,你最迟5:30必须要到车站才可以赶上火车.所以选 due 和 by.
答案供参考,

“by+时间”意为“不迟于(=not later than)”。

due is the right choice.

  • by: If something happens by a particular time, it happens at or before that time.  在…时候;到…之前;不迟于

  • due:预期的

  • The early train is _due_ to leave at five in the morning.You'd better get to the station _by_ 5:30 at latest

    早班火车预计早上5点离站,你最迟在5点半到达车站。.

  • around:大约