Icebergs are large pieces of ice in the sea. Icebergs form after breaking away from glaciers (冰川).

Most icebergs are white. There are also many icebergs in Antarctica that are blue. Glacial ice has a lot of small air bubbles (气泡). The icebergs appear to be blue because the air bubbles reflect blue light.

However, there are no air bubbles in green icebergs, which means these icebergs are made out of sea ice rather than glacial ice.

But why does sea ice look green? Scientists at the University of Washington, US, recently found the reason--- iron oxide (氧化铁). It comes from rock dust found on the Antarctic mainland. After studying the green icebergs, scientists found that they have 500 times more iron than glacial ice. The iron comes from bedrock in the ocean. When glaciers grind (碾磨) against bedrock, a powder (粉末) that is rich in iron is created. The powder later mixes with ocean water, which then freezes as green sea ice, Stephen Warren from the university suggested.

This is an important finding because these green icebergs can deliver iron to far parts of the ocean. There, tiny sea plants use the iron as a nutrient (营养物). We thought green icebergs were interesting. But now they may actually be important.

【1】According to the story, icebergs can be ________.

A.white, blue and yellowB.green, blue and yellow

C.white, green and blueD.blue, red and green

【2】Some icebergs look green because ________.

A.there is iron oxide inside of themB.air bubbles inside reflect green light

C.some sea plants are frozen insideD.they are made out of bedrock

【3】The iron in green icebergs comes from ________.

A.glacial iceB.bedrock in the ocean

C.dead bodies of sea animalsD.industrial waste

【4】What can we infer (推断) from the story?

A.Green icebergs can only be found in Antarctica.

B.Glaciers don’t have any color.

C.Sea ice does not have air bubbles.

D.Antarctica animals feed on colorful icebergs.

【5】What’s the best title of the passage?

A.Iron OxideB.Mystery of the Green Icebergs

C.The Change of ColorsD.Differences between Glacial and Sea Ice

【1】Would either of you______（want）to play the piano?

【2】We should keep______（silence）in library.

【3】When the teacher came in, the students stopped______（talk）.

【4】I mean______（go）to Beijing for the holiday.

【5】As a student, we should listen to teachers______.（careful）

Even people who spent just a few hours a week on the Internet felt more depression (沮丧) and loneliness than those who spent little time on the Internet, the two-year study showed. And it wasn’t that people who were already feeling bad spent more time on the Internet, but that using the Internet seems to cause the bad feelings.

Scientists are surprised at the results. They were quite different from what they thought before. They thought that the Internet would make people psychologically healthier than TV, because users on the Internet are free to choose their information and to communicate with others.

However, the scientists also say, when people spend a lot of time or even all the day time on the Internet, there is no time left for them to be with their family and friends. They can’t have real conversations. Another possible reason is that people can see the outside world on the Internet and it makes them less satisfied with their lives.

判断正(A)误(B)

【1】Internet use seems to be bad for people’s psychological health.

【2】People are free to choose their information when watching TV.

【3】The more time you spend on the Internet, the less time you are with your family and friends.

【4】People are not satisfied with their lives so they spends lots of time on the Internet.

【5】The passage mainly talks about the influence that the Internet causes.

Months ago, my best friend Daisy was listening to me ______ about Catherine until she just became really angry. “Either break up with her, or leave me alone.” She shouted at me, “I’m tired of listening to your complaining.” Her words surprised me, and I began to keep myself away from Catherine. Later, I did ______ her.

Now I try to remain happy and positive (积极的) about life, and find friends of the same. There’s been scientific research lately. It shows that people who find ______ to be thankful for their lives are actually happier, and I believe that is true. Endless complaining seems to control your life ______ you let it come into your brain. And too much complaining will actually make your life ______.

Some people take “gratitude (感激之情) walks” every day, where they think about their lives in a positive way. By developing a grateful attitude, you can be turned away from what’s troubling you, and ______ what makes you happy. Then you will have a beautiful life.

【1】A.keepsB.stopsC.enjoys

【2】A.full ofB.far fromC.famous for

【3】A.noisyB.strongC.dirty

【4】A.hardlyB.suddenlyC.silently

【5】A.thinkingB.worryingC.complaining

【6】A.chooseB.helpC.forget

【7】A.reasonsB.excusesC.questions

【8】A.ifB.unlessC.until

【9】A.betterB.longerC.worse

【10】A.againstB.towardsC.through

* Have yearly exams. 【1】 Experts advise parents to bring babies 6 to 12 months of age to the doctor for a careful check. The good news is that most of children now can have yearly eye exams and following treatment, including eyeglasses.

* Protect against UV rays (紫外线). Long-term stay in the sun creates risk to your eyes. No matter what the season is, it’s extremely important to wear sunglasses. 【2】

* Give your eyes a break. Two-thirds of Americans spend seven hours a day using computers or other digital products. 【3】 Experts suggest that people practice the 20/20/20 rule: every 20 minutes, take a 20-second break and look at something 20 feet away.

*【4】 As part of a healthy life style, eat more fruits and vegetables each day. Vitamins (维生素) C and E help protect eyesight and improve eye health.

* Practice safe wear and care of contact lenses (隐形眼镜). Many Americans use contact lenses to improve their eyesight. Some follow the medical instructions for wearing contact lenses, but many are breaking the rules and putting their eyesight at risk. 【5】 Otherwise, you may have problems such as red eyes, pain in the eyes, or a more serious condition.

A.Eat your greens.

B.Eye care should begin early in life.

C.They can properly protect your eyes.

D.This eye activity increases the risk for eye tiredness.

E.Parents usually don’t care about their own eyesight.

F.Always follow the doctor’s advice for the right wear.

【1】用neither…nor…，either…or…或both…and…改写下列句子

I haven't seen a TV play for long and Lily hasn't, either.

______ I______ Lily______ seen a TV play for long.

【2】用neither…nor…，either…or…或both…and…改写下列句子

You can go to New York with the headmaster, or Daisy can.

______ you______Daisy can go to New York with the headmaster.

【3】用neither…nor…，either…or…或both…and…改写下列句子

Philip can speak English well and he can speak French, too.

Philip can speak______ English______ French.

【4】用neither…nor…，either…or…或both…and…改写下列句子

These trousers don't fit me. Some are too long and the others are too short.

These trousers don't fit me. They are______too long______too short.

【5】用neither…nor…，either…or…或both…and…改写下列句子

Tom isn't at home and he isn't at the office, either.

Tom______ at home______ at the office.

grow up, process, mix, shut, punish

【1】The teacher seldom __________ the students who make mistakes.

【2】One of the young pioneers _________ the door of the classroom now.

【3】This kind of instrument must _________ in the big factories.

【4】I’m happy to see that all of my children _________already.

【5】Jenny put the meat and the vegetables in the bowl and _________ them together.

A.anything elseB.else somethingC.else nothingD.everything else

—Yes, just as President Xi says, “Happiness is achieved through hard work.”

A.how we can find happinessB.who can help achieve happiness

C.where was happiness fromD.why happiness was so important to us

【1】他走得如此匆忙，以至于在犯罪现场留下很多线索。

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【2】观看这样无聊的电影真是浪费时间。

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【3】据说特价优惠被取消了。

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【4】警察想弄清楚这个老板是否说了真话。

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【5】不仅我还有David都适合做这份工作。

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