英语三级B级

单选题

A.About 20 hours.
B.So long.
C.Very fast.
D.usually go home by air.

参考答案:A进入在线模考
How long will it take you to go home by train?,。
【答案】A
【解析】“How long...?”是询问多长时间的疑问词,本题问的是“你坐火车回家要多长时间?”B、C、D三项都不符合题意,只有A“大约20小时”是最合适的选项,故选A。

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