A.Americans are used to travelling by cars |
B.American public transportation is growing worse |
C.American car industry caused disastrous road accidents |
D.American people’s health is threatened by automobiles |
A.Americans prefer cars to anything else |
B.Americans are interested in fast automobiles |
C.kerosene-burning engines cause more problems |
D.kerosene-burning engines are green transportation |
A.technology is always good for people |
B.technology is a sword with two sides |
C.more attention should be paid to social effects |
D.US doesn’t care about the environment at all |