B.            Public transportation increases the economic.

C.           Driving a private car can lead stress and health problem.

D.           There are several kinds of public transportation.

E.            The number of vehicles on the road affects the environment.

2.  What does the writer expect through the writing?

A.            People maintain their health.

B.            People care to the environment.

C.           People drive their own vehicles.

D.           People board public transportation.

E.            People walk to bus and railway station.

3.  “A clean environment boosts living standards” (Paragraph 3)

The underlined word can be replaced with...

A.            Take 

B.            Raise

C.           Build