—— Hurry up. The bus is coming! —— Oh, no, we mustn’t cross the street ______ the traffic lights are green.
#55778
A
after
B
since
C
when
D
until
推荐题目
— Why didn’t you try your best to get on the subway? — I tried to, but it started moving ______ I could get on it.
#56001
A
before
B
after
C
since
D
if
