—— Hurry up. The bus is coming! —— Oh, n
题型:选择题
问题:
—— Hurry up. The bus is coming!
—— Oh, no, we mustn’t cross the street ______ the traffic lights are green.
A.after
B.since
C.when
D.until
—— Hurry up. The bus is coming!
—— Oh, no, we mustn’t cross the street ______ the traffic lights are green.
A.after
B.since
C.when
D.until