Two clever children - Peter, 11, and his sister Karen, 9, found a stolen car in woods near Sai Kung yesterday morning. The pleased owner, Mrs. Judy Roberts, said that she would take the children out to dinner to show her thanks. The two children were studying at Sai Kung Primary School. They were walking along a path on their way to school when they noticed a car covered with branches which were pulled down from a tree. The children were a bit surprised because very few people parked their cars there. They looked inside the car but there was nobody in it. What did the children do then? They made a note of the type of the car and its color. Peter also wrote down the number of the car. When they got to school, they told their teacher what they had seen. The matter was reported to the police station. After the police collected some important information, Mrs. J. Roberts was traced. "I lost my car two days ago and I have been very sad. I'm glad to have it found now. I really have to thank Peter and Karen and I will take them out to dinner. I'm also going to write to the headmaster of Sai Kung Primary School to speak highly of the teachers." Mrs. Roberts said. Peter and Karen's teachers were proud of these two small detectives. "Peter and Karen are not only good students but also responsible members of the society," the headmaster, Mr. Smith said.

The children were surprised to see the car because ______.

A.people did not usually park a car there

B.they could not find anyone in the car

C.there were no cars there before

D.someone covered the car with branches