阅读短文，用括号中所给词的适当形式填空。

     One day Mr. and Mrs. White    1     (go) shopping by car. They    2     (stop) their car near a shop.

They   3     (buy ) many things from the shop and the things were very heavy. They wanted    4    (put)

the things in their car. But Mr. White couldn't open the door of the car. "Let's   5     (ask) a policeman to

help us." The policeman was very friendly     6     (help) them open the door of the car. At that time a

man     7    (come) up and shouted, "What are you doing with my car?" Mr. and Mrs. White looked

at the number of the car and then    8     (say) sorry to the man.