问题描述:
board 的用法
He ( )a train and left her forever.
A boarded
B boarded in
C boarded on
为什么?什么时候可以用上BC的?
He ( )a train and left her forever.
A boarded
B boarded in
C boarded on
为什么?什么时候可以用上BC的?
问题解答:
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