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
It is only when you nearly lose someone _____ fully conscious of how much you value him.
#84882
A
do you become
B
then you become
C
have you become
D
that you become
I can’t remember ______ I met the man. 
#85471
A
where was it
B
it was where  
C
where it was that
D
where was it that
 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