单项选择题

______ before you leave the lab.

A．Make sure that the windows are shut
B．To make sure that the windows are shut
C．Making sure to shut the windows
D．To be sure to shut the windows
<上一题 目录 下一题>
热门 试题

单项选择题
I was impressed______the efficiency of the work done in the company.
A. in

B. about

C. with

D. for
单项选择题
The idea came to me when I ______ with him.
A．talk



B．talked
C．was talking


D．have talked
相关试题