Question

We were about to go out for a walk ______ it began to rai

We were about to go out for a walk ______ it began to rain. A．while B．before C．as D．when

Answer 1

D

试题分析：考查固定句式。固定句式：be about to do sth when…正要做某事在这时…。本题中的when是一个并列连词，意为：在那时；故D正确。 点评：固定句式：be about to do sth when…正要做某事在这时…。本题中的when是一个并列连词，意为：在那时；对于这样的固定句式，平时要加强识记。