Was it 80 years before Christopher Columbus crossed the Atlantic ______ Zheng He hadsailed to East Africa? 
#84845
A
when
B
that
C
after
D
since
推荐题目
Was it not until you began to work ___ how much time you had wasted?
#85385
A
did you realize
B
that you realized
C
did you not realize
D
that you didn’t realize
It is not until 1997 ______ he entered university.
#85509
A
which
B
that
C
when
D
since
 It was in the room _______ he was born _______ the meeting was held. 
#84775
A
that; that
B
which; where
C
where; that
D
where; which