the train from shanghai will arrive ---- A in a quarter past six B at a quarter past six

问题描述:

the train from shanghai will arrive ---- A in a quarter past six B at a quarter past six

B
at加具体时间
in加具体的天

a quarter past six
6.15为具体时间所以用at

the train from shanghai will arrive at a quarter past six
来自上海的列车将在6:15到达

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