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
B
be sure that 确信，保证；make sure that 确保。
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
B
be sure that 确信，保证；make sure that 确保。