That day, we______ for the train station when Tom fell and hurt his legs badly.A

题型：不详难度：来源：

That day, we______ for the train station when Tom fell and hurt his legs badly.

A．have been leaving	B．were just about to leave
C．have left	D．are just going to leave

答案

B

解析

试题分析：考查固定句式。固定句式be doing sth/be about to do sth when…正在做某事在这时发生了意料之外的事情。When是一个并列连词，意思为“在那时”句意：那一天，我们正要出发去车站，在这时Tom摔倒了伤到了他的腿。故B正确。
点评：本句式中的when是一个并列连词“在那时”；后面引导的是一个并列句。要特别注意be doing sth/be about to do sth when…正在做某事在这时发生了意料之外的事情。