问题
选择题
---Excuse me, could you tell me _______?
---Sorry, sir. I wasn’t there at that time.
A．how did the accident happen
B．how the accident happened
C．how does the accident happen
D．how the accident happens
答案
答案：B
题目分析：句意：对不起，你能告诉我事故怎样发生的吗？对不起，先生。我那时不在场。在宾语从句中只能使用陈述句语序，不能使用疑问句语序。由I wasn’t there at that time.知该用一般过去时态，所以选B。