题干
You_______that mistake；you were too careless．
A：should not make
B：should not have made
C：ought not have made
D：must not have made
答案(点此获取答案解析）
B
A：should not make
B：should not have made
C：ought not have made
D：must not have made
，遇到黄灯的概率为 
，那么他遇到绿灯的概率为（ ）