问题

It ________ some time _________ I realized the truth
A:was; before
B:is; before
C:has been; until
D:has been; after
B:is; before
C:has been; until
D:has been; after
正确答案是:
同类题型
How do you study____ a test –I study____working_______my classmates.
The boy________on the bed________to his friend that a cock laid an egg yesterday. [ ]
.Shortly after we .the chairman took his place and declared the meeting open .
In our childhood, we were often _______ by Grandma to pay attention to our table manners. [ ]
I’ve taken someone else’s green sweater by mistake. — It ______ Harry’s. He always wears green.