Each Friday, my son's kindergarten(幼儿园)class has “a prize day”. All the children who do well in the week can get a prize. The children have behavior cards. The cards start out green every morning, but are changed from green to yellow, orange and finally to red if they do something wrong. Most of the children never change their cards from green.

On many Fridays, a boy named Tommy often walks out with an unsmiling face because he has had a bad day or two that week. Tommy is a naughty boy and he often causes trouble. Other children would tell their parents, “Tommy got angry, ” or “Tommy didn't listen to the teacher, ” or “Tommy got trouble today.” But recently, things have become much better for Tommy. My son reports proudly each day, “All GREEN today.”

Last night, after I kissed him goodnight, he said he was very excited because tomorrow was a prize day. “And I hope, hope, hope that Tommy stays on green!” My heart was filled with pride. I told my son how kind it was of him to think of Tommy rather than caring about his own prize.

阅读短文, 根据短文内容回答问题。

1.What color is a behavior card at first?

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2.What did it show if a boy's card was changed into red?

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3.How was Tommy at school recently?

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4.Why was the writer's son excited that night?

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5.Why does the father take pride in his son?

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Pollution means adding dirty or harmful things to land, air, water and so on. As a result, they are no longer pleasant or safe to use. Pollution is bad for animals and plants, and it even makes people's health in danger. In our daily life, we can see different kinds of pollution in many places. There are three main forms of pollution: land pollution, air pollution and water pollution.

Land pollution is caused by solid waste, such as cans, bottles and some plastic things which aren't broken down quickly. It makes the environment look very bad. However, air pollution is more serious than land pollution. It is much worse in cities and towns because of the fumes(废气)from traffic and the waste from human activities. When people drive their cars, fumes which are most made up of CO2, NO2 and SO2 are given off. After the gases get into the air, they may mix with clouds. Then they will become some harmful chemicals falling on the ground with rain. It is one of the reasons for soil erosion(土壤侵蚀)which is one example of water pollution.

Various kinds of pollution will cause many health problems. People have realized they must change this serious situation. There are many ways to control pollution. To develop alternative energy(替代能源)is very popular in many countries. China, for example, has made up its mind to be a leader in this field. It is trying hard to make full use of energy from the sun and wind. It has paid plenty of money to make electric cars and trains instead of traditional traffic. We should also take action to make our environment cleaner every day. Take cloth bags while going shopping and drive cars less. We have only one earth. We must take small steps now to help protect our environment for the future wherever we are.

1.The underlined word “solid” in the passage means “________” in Chinese.

A.气体 B.液体

C.固体 D.土壤

2.When people live in a polluted area, ________.

A.they will control the use of alternative energy

B.their health will be in danger

C.they will get stronger and stronger

D.they will be pleasant and safe

3.The main idea of this passage should be ________.

A.to introduce the kinds of pollution and the problems it causes

B.to introduce the kinds of pollution and the ways to control it

C.to introduce the harmful chemicals and soil erosion

D.to introduce the alternative energy and the way to use it

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