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
You can ________ in a parking lot.
In the past few years there _________great changes in my hometown.
____________do you play soccer? —Every day.[ ]
Have a cigarette, will you ? —No, thanks. I _________ heavily, but I’ve given it up recently.
_____ doesittakeyoutofinishyourhomeworkeveryday?—Aboutanhour. [ ]