题目内容
Whoever leaves the lab last, _____ all the lights are turned off.
A.make sure | B.make sure of | C.be sure | D.be sure of |
A
解析

练习册系列答案
相关题目
—How will you deal with these papers, Ann?
—I will leave them to takes over the job.
A.anyone |
B.someone |
C.whoever |
D.no matter who |