阅读理解。
One day , Mr and Mrs White go shopping by car . They stop their car near a shop . They buy many things from the shop . And the things are very heavy , so they want to put them in their car .
But Mr White can’t open the door of the car . “Let’s ask a policeman for help .” says Mrs White . They ask a policeman to help them . The policeman is very friendly to help them open the door of the car . At that time a man comes up and shouts , “What are you doing with my car ?” Mr and Mrs White look at the number of the car , then they say sorry to the man .
根据短文内容选择正确答案。
（1）Mr and Mrs White go shopping __________ .
A. by bike
B. by car
C. with their son
（2）They want to _________ .
A.put the heavy things into their car
B.look for a policeman
C.buy a car
（3）Mr White can’t open the door of the car ____________ .
A.but Mrs White can
B.but the policeman can
C.but the owner of the car can
（4）_________ helps them open the door of the car .
A. An old man
B. A woman
C. A policeman
（5）They look at __________ and they know they are wrong .
A. the policeman    
B. the man        
C. the number of the car