Question

【题目】Sorry I’m late. The first underground started moving __________ I could get on it.

A. while B. before C. as soon as D. after

Answer 1

【答案】B

【解析】句意：对不起我迟到了。直到我上去的时候，第一层楼开始移动。A. while当……的时候；B. before在……之前；C. as soon as一……就；D. after在……之后。根据题意，故选B。