阅读理解。判断正(√)误(x)。

    One day, Mr. and Mrs. Smith go shopping by car. They stop their car

near astore. They buy many things. And they want to put the things in the

car. But Mr.Smith can't open the door of the car. They ask a policeman to

help them. The police-man is very friendly to help them. Just then a man

comes up and shouts. "What are you doing with my car?"

    Mr. and Mrs. Smith look at the car's number and they are frozen there. It

isn't their car.

( ) 1. Mr. and Mrs. Smith go shopping in a car.

(     ) 2. They buy many things.

(     ) 3. Mr. Smith opens the door of the car.

(     ) 4. A policeman helps Mr. Smith open the door.

(     ) 5. This isn't their car.

手术后几天仍有疼痛者，必须查明原因（）

A.1天

B.2天

C.3天

D.4天

E.5天