----Why did you leave without a word of warning to John?
----But what otherwise? He never listens to me.
A. must I have done
B. should I do
C. could I have done
D. would I do
网友回答
A. must I have done
(答案→)B. should I do
C. could I have done
D. would I do
解析：B 根据句意“要不然，我该怎么办呢？他从不听我的。”知，答案选B, should“应该”。