听下面一篇短文，短文后有5个小题，从题中所给的A、B、C三个选项中选出最佳选项。
1. Where did the dog stay one day?
A. At the gate.
B. On the grass.
C. In the school.
2. What happened to the children?
A. They were ill.
B. Their house was on fire.
C. Their dog ran away.
3. Why was the dog worried?
A. He couldn't see the children.
B. Many people were in the street.
C. The firemen were busy working.
4. Who took the dog to the children?
A. A friend.
B. A neighbor.
C. A fireman.
5. What kind of dog was it according to the story?
A. Ugly.
B. Helpful.
C. Strong.
