Question

【题目】— Did you catch the first subway this morning?
— No, I didn't. It had started moving ______ I could get on it.
A.since
B.after
C.as soon as
D.before

Answer 1

【答案】D
【解析】句意：——你今天早上赶上第一班地铁了吗？——没有，我到那里之前就开走了。since自从；after在……之后；as soon as一……就；before在……之前。所以选D。