【题目】--- Why didn’t you help the little boy?
--- Oh, he had struggled to his feet ______ I could run over and offered any help.
A. beforeB. after
C. whenD. since
在线课程【答案】A
【解析】
考查连词辨析。句意：“你为什么不帮助那个小男孩？”“噢，我还没来得及跑过去帮他，他就挣扎着站了起来。” A. before在……之前；B. after在……之后；C. when当……的时候；D. since自从，既然。故A选项正确。