问题
选择题
. ---You were brave enough to raise objections at the meeting. ---Well, now I regret ___________ that.
A．to do
B．to be doing
C．to have done
D．having done
答案
答案：D
搜题请搜索小程序“爱下问搜题”
. ---You were brave enough to raise objections at the meeting. ---Well, now I regret ___________ that.
A．to do
B．to be doing
C．to have done
D．having done
答案：D
mgtgθ
mgsinθ