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.

根据短文内容,选择最佳答案。

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

完形填空

阅读下面短文,然后从各题所给的四个选项中选出一个最佳答案

One day, the students of Class 6 were reading in the classroom. Mrs. Brown came in and told the whole class that they would have to change _ _ in March. The naughtiest(调皮的) class in the grade could not ______ it. The pupils all disagreed with the decision, so they shouted when Mrs. Brown said it was because a new pupil would be _______ the class. The class was in disorder. “Why must we move to another classroom just because someone new is coming?” one of them asked ________. Mrs. Brown waited patiently before the class without saying anything. The students saw it and they became quiet. Mrs. Brown told them to be _______ to their new classmate and then she left.

The following week, the class understood _______. The principal himself brought the new student to their class. ______, Mr. White pushed the new student to the class because the student was in a wheelchair. Mr. White _____ the new student as Jeff and asked them to be friendly to him. He said that Jeff now was a _______ of the class and they should work together. He added,“ A house divided (分开) against itself cannot stand.” ______ could fully understand what Mr. White meant at first.

Over time, they began to understand what their principal meant. Jeff was a _____ student and often lent a helping hand to students who did not understand _______ work. They felt very thankful to him. They took turns to wheel him about ______ they knew well that when someone did something for you, you ________ do something back in return. Not only did their results ______ , but their behavior became better. It was a special year Class 6 would never forget.

1.A. partner B. lesson C. teacher D. classroom

2.A. try B. catch C. believe D. manage

3.A. leading B. helping C. visiting D. joining

4.A. sadly B. angrily C. seriously D. coldly

5.A. nice B. useful C. honest D. careful

6.A. why B. where C. when D. how

7.A. So far B. Above all C. As usual D. In fact

8.A. mistook B. described C. introduced D. remembered

9.A. hope B. member C. monitor D. symbol

10.A. Nobody B. Somebody C. Anybody D. Everybody

11.A. lucky B. strict C. funny D. bright

12.A. his B. her C. their D. our

13.A. if B. because C. until D. though

14.A. should B. could C. might D. would

15.A. appear B. develop C. improve D. continue

March 28 is China’s National School Safety Day. Earthquakes happen all the time all around the world. It is necessary to know safety tips for earthquakes. Here is the Drop, Cover and Hold ways for personal safety during an earthquake.

DROP: Drop down to the floor.

COVER: Take cover under or beside a piece of furniture(家具). Protect your head and neck with your arms. Stay away from windows, mirrors and tall furniture.

HOLD: If you take cover under or beside a piece of furniture, hold on to it until the ground stops shaking.

School tips

Stand beside a wall. This will protect you from falling things. Don’t stand near windows or under lights.

Public area tips

When you are in a bookstore or shopping mall, get down beside the counters(柜台) or in the corner. Protect your head with your arms or bag.

Stay away from big billboards(广告牌).

Home tips

If you’re in the kitchen, move away from the fridge and lights. When you leave, don’t use the lift; take the stairs.

1.Which of the following can you choose to cover yourself during an earthquake?

A. A table B. A fridge

C. A window D. A billboard

2. How many ways to keep safe are mentioned in this passage?

A. Three B. Four C. Five D. Six

3. Which behaviors are safe during an earthquake?

A. ① and ② B. ① and ③ C. ②and ③ D. ③ and ④

4.The writer mainly tells us that .

A. the earthquake happens all the time in the world

B. it’s necessary to know safety tips for earthquakes

C. the earthquake is so terrible that we can’t avoid it

D. it’s important to protect our heads with our arms or bags.

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