阅读理解
Many people like animals. Now a lot of people have animals as pets (宠物). Usually people like
to have dogs, cats, fish and other animals. Many young people have animals because they think these
animals are interesting. Some old people have pets because they don't live with their children.Molly
lives in No.25 Garden Street. He is a doctor, but he helps dogs. People usually call him The Dog
Doctor. When their dogs get sick (生病), they call him on the telephone. He goes to the people's
houses and helps them. He gives the dogs the right medicine(药物). Wherever(无论) he goes, he is
always welcome.
1. What kind of animals do people keep?
A. Dogs.
B. Cats.
C. Fish.
D. A1l of the above.
2. Why do old people keep pets?
A. Because they don't live with their sons or daughters.
B. Because they don't have children.
C. Because they think animals are interesting.
D. Because they like animals.
3. Does Molly help animals?
A. Yes, he is.
B. Yes, he does.
C. No, he isn't.
D. No, he doesn't.
4. Which is the best title (题目)?
A. A Dog Doctor.
B. A New Pet Store.
C. Pets and Doctors.
D. An Interesting Animal.
5.Where does Molly live?
A. In a hospital.
B. In a city.
C. In a garden.
D. In No.25 Garden Street.
，其中O表示氧原子，中心黑点表示硅原子。硅氧四面体通过不同方式的连接可以组成各种不同的多聚硅酸根离子。下图为某无限长单链的多聚硅酸根离子：