问题

Who saw it ______ at that time?
A: happen
B: happened
C:happens
D: to happen
B: happened
C:happens
D: to happen
正确答案是:
同类题型
When the fire broke out, Mary didn’t know _____. [ ]
The number of the students in our school isabout nine _____. —I see. ______of them are boys.
nds of promotion activities were launched,for the May Holiday Market.
Viewers will have ____ second chance to seeSaturday’s concert on ____ Channel 4 tonight.
Do youwant tea or coffee— _______Whichever one you’re making