9．What are the speaking about?
A.A way to impreve air quality. B.A problem with traffic rules.
C.A suggestion for city planning.
10.What does the man suggest?
A.Limiting the use of cars. B.Encouraging people to-wall.
C.Waming drivers of air pollution.
11.What does the woman think about the man’s idea?
A.It’s interesting. B.It’s worth trying. C.It’s impractical.
