问题
选择题
I_______________ that all windows are shut. I did it.
A．make sure
B．am sure
C．make clear
D．am clear
答案
答案：B
搜题请搜索小程序“爱下问搜题”
I_______________ that all windows are shut. I did it.
A．make sure
B．am sure
C．make clear
D．am clear
答案：B