问题
The operation room in every hospital has to______ bacteria of any kind.
A:intends,familiar
B:make it free from
C:be made free from
D:be kept free from
B:make it free from
C:be made free from
D:be kept free from
正确答案是：
同类题型
You never stay up till midnight, do you—___________. But I think it’s bad for our health.
I think____________ necessary _____________ to take more exercise.
The sandstorm_for several days，whichleft a terrible sight across the west
Did you know more about the mine accident—Oh，sorry，I had no idea I ________ the Rescue Center now