题目内容：

There are four main areas when it comes to your dog’s body language — his ears and face, eyes, nose and tail. If you pay attention to those things, you’ll find you are able to easily understand how your dog is feeling.

Ears and face

The head of a dog is more expressive than you think. If you say a word that he recognizes, like his name or something you say often, his ears will get up. His mouth is another good instruction. A mouth that is wide open to pant (喘气) with some sound suggests that the dog is happy — some people even say when a dog is panting, he is laughing as he cools himself. A tongue sticking out suggests that the dog is in a good mood.

Eyes

To a dog, purple and blue are both seen as shades of blue. Red is seen as black or dark grey. Orange, yellow and green are seen as various shades of yellow. This means that, to a dog, bright orange toys are the same yellow shade. If you want your dog to clearly see his toys in the green grass you’d better give the dog blue toys; if you have orange, yellow or green toys, the dog will be able to find them with his nose.

Nose

A dog can both sniff and breathe through his nose. Breathing is for air, but when dogs sniff with short breaths they are actually following some scents (气味) with his keen (灵敏的) nose. When a dog is overheated, his sense of smell is reduced by as much as 40 percent and he uses the air to cool himself rather than for smelling. Puppies’ noses can help find their mother when their eyes and ears are closed. The function will disappear by the time they are adults.

Tail

Lastly, you need to pay attention to your dog’s tail, because it shows what he is thinking and feeling. A dog that is in a good mood will have a tail that seems to be going a mile a minute — wagging, and excited. However, an angry or frightened dog will have his tail between his legs.

1.The author’s purpose in writing the first paragraph is to _____.

A. advise you to look after your dog

B. introduce the topic of the passage

C. explain what is body language

D. call on anyone to protect dogs

2.When your dog feels happy, he will _____.

a. keep his mouth wide open soundlessly

b. bark all the time in front of you

c. open his mouth to breathe with some sound

d. keep his tongue sticking out

A. a, b            B. c, d           C. a, d            D. b, c

3.Why does your dog use his nose when looking for orange, yellow or green toys in the grass?

A. Because he wants to show how keen his nose is.

B. Because his nose is keener than his eyes in the open air.

C. Because he can’t tell the difference between toys and grass.

D. Because these colors are all shades of yellow in his eyes.

4. Which of the following is TRUE according to the last two parts “Nose” and “Tail”?

A. Adult dogs can’t use their nose to find their mothers.

B. When a dog feels too hot, he will lose his sense of smell.

C. Dogs often sniff with short breaths when they feel sad.

D. A dog’s tail can’t show his feelings unless he is frightened.