Question

【题目】We were about to set off _____ Tom came to me.

A. while B. when

C. as D. since

Answer 1

【答案】B

【解析】

考查固定句式。句意：我们正要出发，这时汤姆来找我。be about to do sth.---when---，正要做某事，这时候---，故选B。