A dog can’t speak any words, but it can “talk”. It has feelings just as you do. Sometimes it may feel angry or afraid. Watch a dog closely, and you can find out how it feels. You can see what it is trying to tell you. When you are afraid, you may look down. When a dog is afraid, it may run away. When you are angry with other people, you stare at (凝視) them. An angry dog also stares. Sometimes the hair along its back stands up.

Do you feel guilty(有罪的) when you do something you shouldn’t do? Dogs can feel guilty, too. Sometimes when I come home, my dog gives me a guilty look. Then I know he did something wrong.

Dogs need love and care. Some dogs are very unhappy when they are alone for a long time. Some dogs even snap (撕咬) if they don’t get enough care.

You may have a dog or you may know a dog. Take care of it well if you want to have fun with it. Take it on walks. Don’t make it do too many things. Try not to punish (懲罰) it again and again for doing the same thing. Always remember, a dog has needs and feelings just as you do. Talk to a dog, and it will talk to you.

1.When a dog is afraid, it may _______.

2.When ______, you know that a dog has done something wrong.

3.If a dog snaps at things, it may ________.

A dog can’t speak any words, but it can “talk”. It has feelings just as you do. Sometimes it may feel angry or afraid. Watch a dog closely, and you can find out its feelings. You can see what it is trying to tell you. When you are afraid, you may look down. When a dog is afraid, it may run away. When you are angry with other people, you stare at(凝視) them. An angry dog also stares. Sometimes the hair along its back stands up.
Do you feel guilty (有罪的) when you have done something wrong? Dogs can feel guilty, too. Sometimes when I come home, my dog gives me a guilty look. Then I know he has done something wrong.
Dogs need love and attention (關(guān)心). Some dogs are very unhappy when they are left alone for a long time. Some dogs snaps(撕咬)if they don’t get enough attention.
You may have a dog or you may know a dog. Treat it well if you want to have fun with it. Take it for a walk. Don’t order（命令） it round too much. Try not to punish (懲罰) it. Always remember, a dog has needs and feelings just as you do. Talk to a dog, and it will talk to you.
【小題1】When a dog is afraid, it may _______.

When you look up into the sky at night, have you ever felt that your eyes are playing tricks on (捉弄) you? It seems that the stars are moving all the time.

Actually, there is nothing wrong with your eyes. This twinkling effect is called scintillation (交光). Scintillation happens because of air movements in the earth’s atmosphere (大氣). Light is “bent (彎曲的)” when it travels through different parts of the earth’s atmosphere. As the air in the earth’s atmosphere is moving all the time, the light from the stars looks as if it is moving too.

The same thing also happens to things on the ground. On a very hot and shiny day, if you look at the road, the image in the distance is not clear and things move slightly. You can also see the same effect if you drop a rock into water. The rock appears a little unclear under the moving water.

This twinkling effect causes a lot of problems for astronomers (天文學(xué)家) since they cannot observe the stars clearly. A telescope (望遠(yuǎn)鏡) was sent into space so that the air movements in the atmosphere could be avoided (避免). It took a long time to build the space telescope but finally in 1990, a huge space telescope called the Hubble Space Telescope was successfully sent into space. Since then, astronomers have many important observations that have helped people understand space better.

根據(jù)短文內(nèi)容，選擇最佳選項(xiàng)。 （10分）

1.What happens to the light from the stars we see when the air in the earth’s atmosphere is moving?

A．It looks even brighter.

B．It looks as if it is bent.

C．It looks as if it is moving.

D．It looks like drops of rain.

2.Scintillation also happens on 　　　　 according to the passage.

A．rainy days                             B．shiny days

C．cloudy days                            D．windy days

3.What can you see when you drop a rock into the water?

A．The rock gets broken.

B．The rock becomes unclear.

C．The water becomes much polluted.

D．The water does not move anymore.

4.The underlined word “observe” means “　　　　”.

A．watch            B．listen             C．draw             D．explain

5.Why is scintillation a problem for astronomers?

A．The stars never stay still.

B．It makes the stars too dark to see.

C．It makes astronomers feel too hot to work.

D．Astronomers cannot observe the stars clearly.