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April 22 is Earth Day. Everyone on Earth should care about and protect the earth!
The earth has warmed by about 1°F (华氏度) over the past 100 years, but why and how?
Well, scientists are not quite sure. Maybe the earth gets warmer and warmer on its own. But many scientists say that people are doing many things which makes the earth warmer.
First, greenhouse effect (温室效应) is a very important reason for the change of the earth. People give out too much energy into the air every year. It makes the earth warmer. Climate (气候) change is another important reason. Sometimes it becomes too hot and sometimes too cold. Sometimes there is too much rain and sometimes too little. The change of the climate makes the earth warmer. In turn, the warmth of the earth changes the climate, too.
When the earth becomes warmer, there may be more rain and a rise in sea level. It will affect the growth of plants, animals and people. On a Pacific island, 100 people have to move to higher ground because the sea is rising. These people can no longer live on the coast. Before that, two islands without people went underwater in 1999. Scientists say that the seas can rise by nearly one metre by 2100.
People can affect the earth's air, land and water. As for us, we can do many things to protect the earth. For example, we can use fridges less. We can tell more people about protecting the earth.
1.Earth Day is probably set for people to ______.
A．learn more about the earth B．make full use of the earth
C．take better care of the earth. D．study the warmth of the earth
2.We can infer (推断) from the passage that the reasons for the warmer earth are
______ now.
A．not very clear B．completely secret C．well known D．not given yet
3.Greenhouse effect comes from______.
A．sea rising B．climate change C．nature's unbalance D．people's activity
4.The passage mainly tells us that ______.
A．there is more rain now B．we should protect the earth
C．we must stop pollution D．sea level is getting higher
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Every 38 gets its light either from daylight 39 the window or from the lamps, 40 no matter what kind of light it is, the way it shines is very important to the eyes.
Take a book and sit with your 41 towards the window, and try to read. Your shadow(影子) falls all over the page and makes it 42 for your eyes as if you were in a 43 room. Now turn around and face the window. The page is in shadow again, 44 the bright light is in your eyes.Try sitting with your 45 side towards the window. This is very good for reading, but if you were writing, the shadow 46 fall across the page and trouble you 47 .There is another way – sit 48 your left side to the window. Now everything is perfect for 49 as well.
Whatever kind of light is in the room, the rule about the right way to sit is 50 the same. So you see different ways to sit make much difference in writing or studying.
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Television has a huge influence on our lives. It is one of the most important ways of getting information. People spend part of their spare time watching television, and much of what they learn comes from it.
What we see on TV — movies，news shows, sports shows, advertisements and so on have increased our knowledge and have changed the way we learn about the world today. However, not everything on TV is true.
Most of the viewers (观众) are children. Television sometimes is like a baby-sitter. It spends more time with children than parents do. But it keeps them in the living room away from healthy outdoor activities. They spend less time playing soccer or walking in the park or playing games in the yard.
Of course, there are some programs on TV that are good for children. But there are also some shows which are bad. Children should not watch unhealthy shows. Maybe we can't change what is on TV, but we can choose what we watch. Do you agree?
【小题1】According to the passage,_is one of the most important ways of gettinginformation.
a. a book b. a computer C. TV
【小题2】_can't be got on Television.
a. Knowledge b. Sports news C. Computer games
【小题3】The underlined word "baby-sitter" means
A. 小妹妹 B. 保育员 C. 女婴
【小题4】What can we do with programs on TV?
A. We can surely change them.
B. We can do nothing.
C. We can choose them.
【小题5】From the passage, we may know_.
A. TV is both good and bad for children.
B. Everything is true on TV.
C All programs on TV are suitable for children. 查看习题详情和答案>>