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There have been many（）in their marriage but they still love each other.
A . right and wrong
B . back and forth
C . ups and downs
D . right and left
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There have been（）medicine in the last 50 years.
A . great advancesin
B . a great advancein
C . great advanceon
D . a great advanceo
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How many causes for the sinking of Titanic have been talked about in this short lecture?
A、7
B、8
C、9
D、10
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There have been no reports ____ of rosiglitazone–associated elevations in the aminotransferase level or hepatotoxicity.
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They have been there twice, _______________ ?
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Though many things have been changed culturally, there is a commitment and sense of responsibility that have not been _____ in today’s society.
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It is _______ just thinking about winning, you have to go out there and win.
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They have been there twice, _______________ ?
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There has been a sharp ______ in profits this year, so some companies have dismissed many employees.
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There have been complaints about the noise from the people ___________ live in the flats.
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I have been told that there will be a delay of at least three weeks before our order can be ____.
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You oughtn't to have been there, __？ A．hadn't you B．didn't you C．oughtn't you D．ought you
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听力原文：W: I've been reading about a new snack food. It's made from fish. Have you heard anything about it？
M: No. I haven't, but 1 don't like fish very much anyway.
W: Not to worry. Although it's made primarily from fish, it actually doesn't have a fishy taste. In fact, it can be flavored with tomato, cheese, or chocolate for instance
M: How can it not taste fishy？ Do you know how this snack food is made？
W: First the fish is minced and cooked and fermented. Then water and starch are added to make a dough.
M: It sounds awful.
W: Actually the dough is very bland al that point, so the flavorings are added to give it some taste.
M: Well, it still sounds a little strange. But I suppose this product will at least be low calorie and high protein. like a health food.
W: Yes, you could call it that. And it has a long shelf life, so it won't spoil quickly. It is also easy to digest and can ha made from types of fish that usually aren't eaten, or from high grade fish by-products,
M: Mm, have you got any samples？ I might be willing to try the cheese-flavored variety.
W: No, none of it seems to be available yet. As I understand it, this fish snack food probably won't be in the stores for another couple of years. So you'll have a while to get used to the whole idea.
M: A couple of years, ah？ It may just take me that long. but thanks for telling me about it.
Which of the following is NOT mentioned in the conversation to flavor the new product with？
A．Tomato.
B．Cheese.
C．Chocolate.
D．Fish.
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The disease is w______ in America and quite recently there have been reports of cases in dogs in the UK.
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听力原文： There seems never to have been a civilization without toys, but when and how they developed is unknown. They probably came about just to give children something to do.
In the ancient world, as today, most boys played with some kinds of toys and most girls with some other. In societies where social roles are rigidly determined, boys pattern their play after the activities of their fathers and girls after the tasks of their mothers. This is true because boys and girls are being prepared, even in play, to step into the roles and responsibilities of the adult world.
What is remarkable about the history of toys is not so much how they changed over the centuries but how much they have remained the same. The changes have been mostly in terms of craftsmanship, mechanics, and technology. It is the universality of toys with regard to their development in all part of the world and their persistence to the present that is amazing. In Egypt, America, China, Japan, and even among the Arctic peoples, generally the same kinds of toys appeared. Variations depended on local customs and ways of life because toys imitate their surroundings. Nearly every civilization had dolls, little weapons, toy soldiers, tiny animals and vehicles.
(4)
A．Because boys and girls are being prepared for different social roles.
B．Because boys are more courageous.
C．Because toy makers want to diversify their products.
D．Because parents have different expectations for boys and girls.
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General elections in New Zealand have been held about every______years since 1879.
A．three
B．four
C．five
D．six
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At the 1986 Chernobyl nuclear accident, there was a very large release of radioactivity in a few minutes, followed by a slowly declining release rate over several months. The total release is estimated to have been about 5×10<sup>7</sup>curies The winds carried the released materials all the way to Sweden, from which the first reports came that there had been a nuclear accident in the USSR.
For the purposes of this problem assume that there was an instantaneous release of 10<sup>7</sup>curies of radioactive gases (and fine particles, which are assumed to remain in the atmosphere and not settle out). Then estimate the maximum ground level concentration of radioactive gases (curies/m<sup>3</sup>) when the radioactive cloud from the accident got to Sweden. Make the following assumptions:
(1) Ignore decay of the radioactive gases (i.e., assume their half-lives were infinite).
(2) Assume the distance between Chernobyl and Sweden is 1000 km.
(3) Assume that the wind speed was 3 m/s and the stability class C.
(4) Assume that the mixing height was 2000 m.
(5) Assume that mlXmg in the x direction(up and down the direction of the wind) has the same intensity as miXing in the y(crosswind)direction.
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The world's population continues to grow. There now are about 4 billion of us on earth. That could reach 6 billion by the end of the century and 11 billion in another 75 years. Experts long have been concerned about such growth Where will we find the food, water, jobs, houses, schools and health care for all these people？
A major new study shows that the situation may be changing. A large and rapid drop in the world's birth rate has taken place during the past 10 years. Families generally are smaller now than they were a few years ago. It is happening in both developing and industrial nations,
Researchers said they found a number of reasons for this. More men and women are waiting longer to get married and are using birth control devices and methods to prevent or delay pregnancy. More women are going to school or working at jobs away from their homes instead of having children. And more governments, especially in developing nations, now support family planning programs to reduce population growth. China is one of the nations that has made great progress in reducing its population growth.
China has already cut its rate of population growth by about one half since 1970. China now urges each family to have no more than one child. And it hopes to reach zero population growth, the number of births equaling the number of deaths, by the year 2000.
Several nations in Europe already have fewer births than deaths. Experts said that these nations could face a serious shortage of workers in the future. And the persons who are working could face much higher taxes to help support the growing number of retired people.
In Paragraph one, the sentence "Experts Dong have been concerned about such growth", the phrase "concerned about" is similar in meaning to______.
A．worried about
B．related to
C．engaged in
D．made a study of
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"During last decade, there have been many changes in family life.""Are these changes ________ ？"
A．for the good or for the bad
B．for the worse or for the better
C．for worse or for better
D．for the worst or for the best
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So far there have not been definite data to confirm_________.
A．where fewer people die from heart problem．
B．whether thev have the risk of heart attack，heart failure or stroke．
C．would probably have lower rates 0f heart disease．
D．how to test a person’s NT—pmBNP level in the blood by himself．
E．his heart muscle would be under pressure in some way．
D．that napping is 0f great benefit to women too.
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Throughout history, people have been interested in knowing how language first began, but no one knows exactly where or how this happened. However, we do know a lot about languages, the languages of today and also the languages of earlier times. There are probably about three thousand languages in the world today. Chinese is the language with the most speakers. English, Russian and Spanish are also spoken by millions of people. On the other hand, some languages in the world have less than one hundred speakers.
There are several important families of languages in the world. For example, most of the languages of Europe are in one large family called Indo-European. The original (最初的) language of this family was spoken about 4,500 years ago. Many of the present languages of Europe and India are modern forms of the language of 4,500 yeas ago.
Languages are always changing. The English of today is very different from the English of 500 years ago. Some even die out completely. About 1, 000 years ago English was a little-known relative of German spoken on one of the borders of Europe.
If a language has a large number of speakers or if it is very old, there may be differences in the way it is spoken in different areas. That is, the language may have several dialects. Chinese is a good example of dialect differences. Chinese has been spoken for thousands of years by millions of speakers. Their differences between the dialects of Chinese are so great that speakers of Chinese from some parts of China cannot understand speakers from other parts.
The first paragraph mainly tells us that ______.
A．most people in the world speak Chinese
B．there are thousands of languages in the world today
C．man has much knowledge about languages
D．some people know several languages
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Anyone, （) is really late for a social activity, should apologize to those who have already been there.
A．whom
B．what
C．which
D．who
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—Have you ever been to Tibet —Yes. I have fantastic__________ of my trip there last summer.
A．time
B．experience
C．days
D．memories
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--Have you ever been to the Great Wall --Yes. I ___ there last year.
A．have gone
B．have been
C．went
D．go
