题目内容:
—Do you know the traffic rules?
—Sure, one of them is that we can’t go across the street _____ the light is green.
A.when
B.until
C.after
参考答案:
答案解析:
—Do you know the traffic rules?
—Sure, one of them is that we can’t go across the street _____ the light is green.
A.when
B.until
C.after