请问一道阅读题:Each year a large number of new cars are made.Most A

请问一道阅读题:
Each year a large number of new cars are made.Most Americans won’t live without cars!
However,the problem of air pollution made by cars becomes serious.
One way to make air cleaner is to make a new kind of car.That’s what large car factories are trying to do.But to make this kind of car is easier said than done.Progress in this field has been slow.Another way is to take the place of the car engine by something else.
To stop the world from being polluted by cars,we’ll have to make some changes in the way we live.Americans,for example,have to cut down the number of their cars.They are encouraged to travel and go to work by bike.
But this change does not come easily – a large number of workers may lose their jobs if a car factory closes down.The problem of air pollution may become less important than the problem of unemployment.
Although cars have brought us a better life,they have also brought us new problems.
( ) 1.Some large car factories are trying to make a new kind of car which .
A.is clean itself B.can clean streets
C.makes less polluted air D.is easier to make
( ) 2.If the number of cars is cut down,the most serious problem for American workers is to .
A.have no work to do B.improve their environment
C.make their factories richer D.go to work by bike
( ) 3.Which of the following is TRUE?
A.Every American worker in car factories hasn’t got a car.
B.To make a new kind of car is one way to make air cleaner.
C.It isn’t easy to change the way of life in the USA.
D.In the USA bikes will take the place of cars in the future.
( ) 4.Which is the best title for the passage?
A.A New Way to Stop Air Pollution B.Cars and Air Pollution
C.Many Serious Problems in the USA D.Changes in Car Production

c a c