In the United States, friendships can be close, constant, intense, generous, and real, yet fade away in a short time if circumstances change. Neither side feels hurt by this. Both may exchange Christmas greetings for a year or two, perhaps a few letters for a while — then no more. If the same two people meet again by chance even years later, they pick up the friendship where it left off and are delighted.

In the States, you can feel free to visit people’s homes, share their holidays, enjoy their children and their lives without fearing that you are taking on a lasting obligation. Do not hesitate to accept hospitality because you cannot give it in return. No one will expect you to do so for they know you are far from home. Americans will enjoy welcoming you and be pleased if you accept their hospitality easily.

Once you arrive there, the welcome will be full and warm and real. Most visitors find themselves readily invited into many homes there. In some countries it is considered inhospitable to entertain at home, offering what is felt as  “merely” home cooked food, not " doing something" for your guest. It is felt that restaurant entertaining shows more respect and welcome. Or for various other reasons, such as crowded space, language difficulties, or family customs, outsiders are not invited into homes.

In the United States, both methods are used, but it is often considered more friendly to invite a person to one’s home than to go to a public place, except in purely business relationships. So, if your host or hostess brings you home, do not feel that you are being shown inferior(次等的) treatment.

Don’t feel neglected if you do not find flowers awaiting you in your hotel room either. Flowers are very expensive there, and hotel delivery is uncertain that the arrival times are delayed, changed, or canceled—so flowers are not customarily sent as a welcoming touch. Please do not feel unwanted. Outward signs vary in different lands; the inward welcome is what matters, and this will be real.

46. In the United States, you will find friendships          if circumstances change.

A. die suddenly                        B. pass away

C. disappear gradually             D. last forever

47. Americans           their foreign friends to make a return for their-hospitality.

A. ask                                B. wish

C. never allow                          D. don't expect

48. In some other countries, giving a dinner party at home is considered        than in a restaurant.

A. less friendly                           B. less hospitable

C. more natural                            D. more popular

49. According to the passage, which of the following is NOT true?

A. Flowers are available at all times.

B.Flowers are expensive.

C.Flowers are signs of outward welcome.

D.Flowers are not necessarily sent to guests.

50. Which of the following is the best title for this passage?

A. American Hospitality.                B. American Friendship.

C. American Invitation.                 D. American Welcome.

Astronomy (天文学) is the oldest science known to man. Thousands of years ago man looked at the stars and wondered about heavens (天堂). But the six planets that he could see with his eyes alone limited man.

The Greeks studied astronomy over 2,000 years ago. They could see the size, color, and brightness of a star. They could see its place in the sky. They watched the stars move as the seasons changed. But the Greeks had no tools to help themselves study the heavens.

Each new tool added to the field of astronomy helped man reach out into space. Until there were telescopes (望远镜), man did not know much about the moon. He did not know that the planet called Saturn (土星) had rings around it. His sight was so limited that he could not see all the planets. In the early 1700s, people thought there were only six planets. Pluto (冥王星), the last of the nine planets to be discovered was seen until 1930.

Before the spectroscopes (分光镜), man didn’t know what kind of gas was in the sun or other stars, without radio telescopes (射电望远镜), we did not know that radio noise came from far in space.

Today, astronomy is a growing science. We have learned more in the past fifty years than in the whole history of astronomy.

Thousands of years ago, man watched ____ with his eyes.

       A. the moon   B. the stars     C. the universe       D. all the planets

When the Greeks watched the stars, they could ____ .

       A. know what the stars were made of     B. not see their places in the sky

       C. help themselves study the heavens      D. watch the stars move as the seasons changed

Until there were ____ , man knew very little about the moon.

       A. telescopes   B. spectroscopes     C. radio telescopes      D. spaceships

People didn’t know about Pluto until ____ .

       A. the 1700s   B. 2,000 years ago      C. 1930   D. thousands of years ago

____ people began to do research on astronomy.

       A. 50 years ago      B. 90 years ago      C. In the early 1700s    D. Over 2,000 years ago

   Vienna——In spite of Iraq’s decision to stop oil deliveries, the 11- nation Organization of Petroleum Exporting Countries(OPEC)will not increase production to make up the shortfall, ministers decided Tuesday in Vienna.

    The 11 oil ministers decided to meet again on July 3 to discuss the effects of the Iraq temporary stop. The organization’s president, Charkid Kheria of Algeria, said after the meeting that stocks were high and prices were stable, so quota increases were not necessary.

    The E.U. Commission has expressed concern about Iraq’s output stop. A speaker said OPEC had to take all possible measures to keep or lower the oil price.

    Saudi Arabia’s Oil Minister Ali Al-Nuaimi had earlier said there would not be any shortfall of oil in the market. The organization had already taken steps to fill the gap, he said. OPEC Secretary General Ali Rodriguez added that the period of Iraq’s output stop was not known, so other exporters were not going to lift quotas yet. If the market was destabilized(使……动摇), a suitable response could be made.

    Iraq on Monday stopped shipments of crude oil to protest against the U.N. Security Council’s decision to extend the oil-for-food programme by only a month, instead of the normal six-month renewal. Just before the Vienna meeting, oil prices had gone up, with a barrel of OPEC crude oil selling for 27.05 dollars, up from 26.81 dollars last Friday. North sea oil was at 29.26 dollars Monday evening.

    OPEC wants the oil price to stay within a margin of 22 to 28 dollars and achieved that with cuts in January and March that reduced 2.5 million barrels per day off quotas(配额).

Iraq made the decision to stop oil deliveries because ___________.

A. oil price is too low in international market.

B. The U.N. Secretary Council has decided to shorten the time of extension of the oil-for-food programme

C. Many oil wells were destroyed during the war in the late 1980s

D. It couldn’t get enough money to develop its economy

The attitude the E.U. Commission took towards Iraq’s output stop is ________.

A. active           B. concerned

C. cold             D. surprised

The underlined words“The organization”here refers to ________.

A. OPEC        B. the E.U. Commission

C. Vienna        D. WTO

The main idea of the passage is ________.

A. the oil prices in the world were stable though Iraq has stopped oil deliveries

B. OPEC has controlled the oil price to stay within a margin of 22 to 28 dollars

C. OPEC will not increase oil production to make up the shortfall that caused by Iraq

D. Oil is connected with people’s daily life

The 11 oil ministers decided to meet on July 3 so that _________.

A. they can persuade Iraq to continue oil production

B. they can have a talk with the U.N. Security Council

C. they can have a discussion about the effects of Iraq’s temporary output stop

D. they can make up their minds to increase oil production

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