None of them knew what had happened _________ I told them about it.    
#55978
A
when
B
until
C
after
D
though
推荐题目
You can’t get good grades______ you study hard.
#55627
A
when
B
because
C
unless
D
that
The flowers ________ well if they ________.
#57290
A
won’t grow, don’t take good care of
B
won’t grow, are not taken good care of
C
don’t grow, are taken good care of
D
don’t grow, don’t take good care of