I didn’t know he came back __________ I met him in the street . 
#58461
A
since
B
when
C
until
D
after
推荐题目
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