Whoever leaves the lab last, _____ all t
题型:选择题
问题:
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
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