---Didyoucatchthefirstsubwaythismorning?  ---No,Ididn’t...

问题详情：

---Did you catch the first subway this morning?

   ---No, I didn’t. It had started moving __________ I could get on it.

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

【回答】

 A 

知识点：连词

题型：选择题