The friendship between humans and dogs possibly began 14,000 years ago. Here are four examples of "a dog's life" in the human world today.

Treated like a queen

Tiffy is one of these dogs. Her owner, Nancy Jane Loewy, treats her like a queen. She patiently prepares Tiffy's meals of meat, fish, chicken and different kinds of fresh vegetables. Tiffy also eats yogurt and biscuits after dinner.

Food sniffer dogs (嗅探犬)

Food sniffer dogs work at international airports in the United States. Their job is to smell and find illegal (不合法 的) fruit,vegetables and other foods in bags and mail. These foods sometimes bring insects and diseases which could be dangerous for plants and animals.

Doggie detectives (侦探犬)

Search-aid-rescue (SAR) dogs use their amazing noses to find people. They can smell tiny dues (线索) that people leave wherever they go. These include bacteria (细菌), small pieces of clothing and hairs. The best known service dogs are guides for the blind. But they can also learn to , turn lights on and off, pick up objects from the floor and even pull wheelchairs.

根据短文内容,选择最佳选项。

1.What food does Tiffy eat?

A.Only yogurt and biscuits. B.Anything except vegetables.

C.Normal dog food from shops. D.Home-cooked meals.

2.Which of the following is the best expression to fill in the blank in the passage?

A.look for missing hikers B.open and close doors

C.do any tasks for people D.follow people here and there

3.What kind of dogs is the most helpful when a child is lost?

A.SAR dogs. B.Whippet dogs. C.Sniffer dogs. D.Queen dogs.

4.What's the purpose of the passage?

A.To introduce different kinds of food sniffer dogs.

B.To tell the readers the importance of protecting animals.

C.To show the special relationships between dogs and humans.

D.To share with the readers the pleasure of keeping dogs as pets.

5.What can Food Sniffer Dogs do?

A.To find people who are lost. B.To accompany kids who feel lonely at home.

C.To smell and find illegal foods. D.To keep the house safe.

根据短文内容,从短文后面的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Americans use many expressions with the word “dog”. People in the United States love their dogs and treat them well. They take their dogs for walks, let them play outside and give them good food and medical care. 1. The expression, to lead a dog’s life, describes a person who has an unhappy life.

Some people say we live in a dog-eat-dog world, We have to face with fierce competition everyday. 2. They say that to be successful, a person has to work like a dog. This means they have to work very, very hard. 3. And the situation would be even worse if they became sick as a dog.

Still, people say every dog has its day, This means that every person enjoys a successful period during his or her life. To be successful, people often have to learn new skills.

4. They believe that older people do not like to learn new things and will not change the way they do things.

Dog expressions are also used to describe the weather. 5. A rainstorm may cool the weather. But we do not want it to rain too hard. We do not want it to rain cats and dogs.

A. Dogs are our friends.

B. We can communicate with dogs.

C. Such hard work can make people dogtired.

D. The dog days of summer are the hottest days of the year.

E. Some people say that you can never teach an old dog new tricks yet.

F. However, dogs without owners to care for them lead a different kind of life.

G. That means many people are competing for the same things, like good jobs.

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