21. The reason why the author was puzzled and angry with the dog was that          .

A. Howard had a strange behavior        B. Howard should be afraid of the metal poles

C. Howard should know the approaching of the terrible lightning

D. Howard bit his trousers in his teeth       

22. Which of the following is true according to the passage?

A. Dogs are cleverer and better than men.   B. Dogs are usually afraid of thunderstorms.

C. Some animals can feel certain things humans cannot.

D. Dogs are naturally born heroes.

23. What can be inferred about the bus shelter from the passage?

A. It was about 200 meters from the author’s home.   B. It was destroyed in a rainy day.