问题
选择题
--- Excuse me, could you tell me _____________?
--- Sorry, sir, I wasn’t there at that time.
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
宾语从句，需用陈述语序，排除A、C，看语境可知，发生在过去，用过去时态，选择B。
