题干
Please ______! The light is yellow now.
A：slow down and stop
B：wait
C：go
D：I don't know.
答案(点此获取答案解析）
A
Please ______! The light is yellow now.
A：slow down and stop
B：wait
C：go
D：I don't know.
，其中
。
，并把它的解集表示在数轴上。