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The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.

A. what B. which

C. that D. though

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Recently some American scientists have given a useful piece of advice to people in industrialized nations．They say people should eat more of the same kind of food eaten by humans living more than 10,000 years ago． 1.

The scientists say that the human life has changed greatly．Our bodies have not been able to deal with these changes in lifestyle and this had led to new kinds of sicknesses． 2. So they are called "diseases of civilization"．Many cancers and diseases of the blood system are examples of such diseases.

Scientists noted that people in both the Old Stone Age and the New Stone Age enjoyed very little alcohol or tobacco, probably none． 3. However, a change in food is one of the main differences between life in ancient times and that of today.

Stone Age people hunted wild animals for their meat, which had much less fat than domestic ones．They ate a lot of fresh wild vegetables and fruits．They did not have milk or any other dairy products, and they made very little use of grains． 4. We eat six times more salt than our ancestors．We eat more sugar．We eat twice as much fat but only one third as much protein and much less vitamin C.

5. But scientists say that we would be much healthier if we eat much the same way the ancient people did, cutting the amount of fatty, salty and sweet food.

A．Modern people used to suffer from "diseases of civilization".

B．People today probably don't want to live like our ancestors.

C．These new sicknesses were not known in ancient times.

D．Ancient people also got lots of physical exercise.

E．In that case, they would live much healthier.

F．But today, we enjoy eating a lot of these.

G．Stone Age people lived a simple life.

The farmers wondered if vegetables could bring in ______crops.

A．as many as B．as good as

C．as much as D．as well as

We're considering students' request ______the school cafeteria should provide more kinds of food．

A． how B． what

C． that D． whether

____ counts is ____ all those trapped in the building have been rescued.

A. It; that B. What; because

C. What; that D. Which; because

阅读理解。

Silk production has a long and colourful history unknown to most people. Scientific discoveries have shown that silk production existed in China from around 2500 B.C., although it could be much older. For hundreds of years, China kept the secret of silk to itself as one for the most closely protected secrets in history. Anyone revealing the secret of silkworms or trying to take silkworm eggs out of ancient China was punished by death.

At one time silk was reserved only for the Chinese emperor. Gradually, others began wearing silk. In addition to being used for clothing, silk came to have industrial uses in ancient China, something that happened in the West only in modern times. Silk was used to make musical instruments, fishing lines, weapons, ropes and even paper. During the Han Dynasty silk became a form of money. Farmers paid taxes in both rice and silk. The prices of goods were calculated in lengths of silk just as they had once been calculated in gold. The importance of silk is even reflected in the Chinese language. For example, of the 5000 most common Chinese characters, around 500 have silk as their “key”.

In spite of their secrecy, the Chinese eventually lost their monopoly on silk production. It reached Korea in around 200 B.C. when immigrants from China arrived there. Silk production came to India in 300 A.D.. It was not until 500 A.D. that silk production came to Europe when travellers smuggled out silkworms in hollow tubes of bamboo. These were used to establish silk industry in Rome (modern-day Italy), although Chinese silk was still considered to be the best.

Silk was brought to Rome from China by means of the Silk Road. There were actually two Silk Roads, one over land and one on the sea. The land route in particular had a huge effect in history. All sorts of trade goods — silver, gold, jade, porcelain — passed along this road. Ideas travelled the Silk Road too. For example the religion of Buddhism was carried to China from India by traders on the Silk Road. The Silk Road created the first international culture, exposing many people to the ideas and treasures of both Western and Chinese cultures.

1.How was China able to keep the secret of silk production?

A. It refused to sell its silk to other countries.

B. Foreigners were not permitted to enter China.

C. The silkworms needed were not able to survive outside China.

D. Chinese passing on the secret to foreigners were seriously punished.

2.Which of the following uses of silk is NOT mentioned in the passage?

A. A way of purchasing goods people sold.

B. A material used for making different products.

C. A method of paying money to the government.

D. A valuable gift given to foreigners travelling in China.

3.In what order did silk production spread throughout the world according to the passage?

A. Europe à India à Korea à China.

B. China à Korea à India à Europe.

C. China à India à Korea à Europe.

D. China à Europe à India à Korea.

4.The underlined phrase “smuggled out” in Paragraph 3 is closest in meaning to ________.

A. quietly traded B. openly removed

C. illegally transported D. violently stole

5.Which of the following is true about the Silk Road?

A. It allowed for economic and cultural exchanges between countries.

B. It made China the most powerful country in the ancient world.

C. It could only be completed by travellers with access to a boat.

D. It was first developed for transferring religious ideas.

Under no circumstances my bike tomorrow.

A、he is borrowing B、is he to borrow

C、he will borrow D、could he be borrowing

Yesterday my aunt sent me an email _______she told me she would come to see me next week.

A. which B. where

C. that D. when

Some children want to challenge themselves by learning a language different from ______ their parents speak at home.

A．what B．that

C．which D．one

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