The weather is changeable. Sometimes it’s very sunny in the morning, but it starts raining in the afternoon, it __1__ be sunny again in the evening. Do you know who changed the weather?

    There are many reasons for it. When the sun __2__, it is day. When the sun sets, it is night. Days are warmer than nights. This is __3__ the sunshine falls on the earth during the day. The sunshine makes the land, the water and the air warm. At night when the sun is not there, it is __4__. In the mornings and in the evenings the sunshine is slanting(斜射). So it is not very hot. At noon the sunshine falls __5__ on the earth, and it is very hot.

    We know that the earth goes __6__ the sun. When one half of the earth is close to (就近) the sun, the other half is __7__ from it. The part of the earth closer to the sun is summer. Here the days are warmer and longer. And the part of the earth away from the sun is winter. Here the days are cooler and __8__. For example, when it’s winter in China, it is summer in Australia.

    People can __9__ the weather, too. We know the temperature on the earth is getting warmer and warmer. This is because the environment has been polluted and destroyed . Now the weather is much worse than before. It’s very terrible. If we want to __10__ our environment, something useful should be done immediately.

(    )1. A. must　　   B. can’t　　       C. may　　        D. should

(    )2. A. rose　　    B. rises　　        C. rising　　       D. sets

(    )3. A. why　　  B. because　　    C. how　　        D. when

(    )4. A. cooler      B. coolest　　      C. hot　　　　     D. hottest

(    )5. A. straight     B. straightly        C. slant　　       D. slanting

(    )6. A. over　　  B. in　　　　      C. round　　      D. below

(    )7. A. off　　   B. wide　　       C. high　　        D. away

(    )8. A. long　　    B. short　　       C. shorter　　     D. longer

(    )9. A. get　　     B. be　　　　     C. become　　    D. change

(    )10. A. improve  B. improves        C. improved        D. improving

 

--   is the weather like in Beijing now?
-- It’s ____________.

A．What, winding	B．How, windy
C．What, windy	D．How, windy

How do you usually get to school? Buy bus? On foot? Roby Burch, 16, a US student, gets to school a little 36__________---he goes by horse (马).
Burch has been riding his white horse 4 miles to and from school 37 __________the beginning of the semester. “Every morning, wearing my blue jacket and jeans, I’m on my way at 6 am.” Burch says, “The streets are mostly 38__________ at this time of morning. It’s a nice way to start the day.”
The idea was his 39__________. His family were enjoying their vacation on their farm this summer, “My dad just said, ‘Roby, you 40__________ ride your horse to school every day.’” says Burch. He thought it really was a good idea.
When they got back home, Burch asked for permission from the headmaster (校长), Joe Cox, and surprisingly, he got the green light. Cox even 41__________ Burch to keep the horse next to the headmaster’s house. Then his dad helped Burch find the best route to school. It is along back streets and has 42__________cars than the others.
For the return trip every afternoon, Burch leaves school at 5:45 pm. Even now, as the days grow shorter and colder, he 43__________ to ride his horse. “ I will ride my horse even in the coldest weather.” he says.
Burch says the first time he sat on a horse as a four-year-old boy he was afraid. 44__________ now, “it’s what I do best.” It’s no surprise that he wants to be a cowboy (牛仔) when he grows up. “I love riding horses more than 45 __________ else.” He says, “It’s really a guy thing.”

【小题1】

A．normally B．casually C．differently D．actually

【小题2】

A．for B．since C．before D．after

【小题3】

A．empty B．crowded C．busy D．awful

【小题4】

A．sister’s B．brother’s C．mom’s D．dad’s

【小题5】

A．will B．won’t C．should D．shouldn’t

【小题6】

A．invited B．allowed C．taught D．urged

【小题7】

A．fewer B．few C．more D．many

【小题8】

A．begins B．stops C．continues D．refuses

【小题9】

A．so B．or C．and D．but

【小题10】

A．anything B．nothing C．everybody D．somebody

The Earth has warmed by about half a degree（0.50℃）over the last 100 years. It could be getting warmer on its own, but many scientists think that people are making the Earth warmer by making a greenhouse effect. The greenhouse effect is important.  Without it, the Earth would not be warm enough for us to live on. But just a little warmer than it is now could cause problems for humans, plants and animals.

Many of the things we do every day can change the Earth’s temperature by sending greenhouse gases into the air. We send greenhouse gases into the air when we watch TV, turn on lights, dry hair, play video games, wash or dry our clothes or drive cars. The rubbish from factories and homes also produces greenhouse gases.

     Even a small change in temperature can affect our weather. This can cause changes in the sea levels, the air, flooding, and our fresh water.

The change in the temperature can also cause changes in the living places for animals and plants, endangering many animals.

     Global warming is a big problem, and every little bit we do can help. We can save electricity. We can save energy in other ways such as by taking buses or walking rather than driving cars. We can recycle to reduce the rubbish and save natural resources such as trees, oil and metals. We can buy products that don’t do bad to the environment and we can turn to solar energy. Remember the little bit that you do will bring a better world.

1. Which of the following does not send greenhouse gases into the air?

A. Watching TV.                     B. Turning on a light.

C. Driving a car.                     D. Walking to school.

2. In this passage, the scientists are mainly trying to make the readers realize___________ .

A. the greenhouse effect is important

B. humans are making the earth warmer

C. the earth is getting warmer in 100 years

D. the earth could be getting warmer by itself   

3. Without the greenhouse effect，we would _____________ .

A. be safer                         B. not be able to live

C. have a cleaner earth                D. have a better world

4. The writer gives us advice on how to save energy in __________ .

A. Paragraph 2                      B. Paragraph 3     

C. Paragraph 4                      D. Paragraph 5

5. Global warming is a big problem but ___________ .

A. we can't do anything to help        B. we don't need to do anything

C. we can do something to help       D. we can do something to stop it