问题
单项选择题
What a fool I have been! Why（）I think of that before?
A.don’t
B.didn’t
C.not
D.do
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
What a fool I have been! Why（）I think of that before?
A.don’t
B.didn’t
C.not
D.do
参考答案：B