[填空题]In the past thirty years Iran has been doing secretly the nuclear enrichment work, which is a direct challenge to the United States, Europe and the rest of the world.

[填空题]In the past thirty years Iran has been doing secretly the nuclear enrichment work, which is a direct challenge to the United States, Europe and the rest of the world.

[单项选择]For more than thirty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages, as well as messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.
Scientists are using powerful radio telescopes to "listen" to signals from about 1,000 stars, all within 100 light years of the earth. In addition, they will scan the entire sky to listen for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight million channels at a time. Scientists are looking for any signal that stands out from the background noise.
Of the 200 billion stars in the Milky Way galaxy, scientists find that five percent of the stars are like our sun. Perhaps half of them have a planet like the earth. Such a p
A. have sent up spaceships to other planets
B. have sent radio and television messages to outer space
C. are listening to the radio message all the year round
D. will use computers to pick up background noise

[单项选择]In the past thirty years many social changes have taken place in Britain. The greatest of these have probably been in the economic lives of women.
The changes have been significant, but, because tradition and prejudice can still handicap women in their working careers and personal lives, major legislation to help promote equality of opportunity and pay was passed during the 1970s.
At the heart of women’s changed role in society has been the rise in the number of women at work, particularly married women. As technology and society permit highly effective and generally acceptable methods of family planning there has been a decline in family size. Women as a result are involved in child-rearing for a much shorter time and related to this, there has been a rapid increase in the number of women with young children who return to work when the children are old enough not to need constant care and attention.
Since 1951 the proportion of married women whose work has grown f
A. social trends in contemporary Britain.
B. changes in women’s economic status.
C. equal opportunity and pay in Britain.
D. women’s roles within the family.

[填空题]In recent thirty years, Confucius and Confucianism are introduced and discussed ______ in France.

[单项选择]For more than thirty years after astronauts first set foot on the Moon, scientists have been unable to unravel the mystery of where the Earth’s only satellite came from. But now there is direct evidence that the Moon was born after a giant collision between the young Earth and another planet.
Previous studies of rocks from the Earth and the Moon have been unable to distinguish between the two, suggesting that they formed from the same material. But this still left room for a number of theories explaining how—for example, that the Moon and Earth formed from the same material at the same time. It was even suggested that the early Earth spun so fast it formed a bulge that eventually broke off to form the Moon.
Franck Poitrasson, and his colleagues at the Swiss Federal Institute of Technology have compared Moon rocks with rocks from Earth and discovered a surprising difference. They analysed the weight of the elements present in the rock using a highly accurate form of mass spe
A. the differences between the Earth and the Moon
B. how man manages to set foot onto the Moon
C. the collision between the Earth and the Moon
D. the origin of the Moon

[单项选择]

During the last thirty years, the international economy has experienced a basic change. Improvements in the Internet and other communications have had important effects on world markets. Faster methods of transport from one place to another have made the world seem smaller to the businessmen. As a result, the world no longer consists of a number of separate economies under the control of different nations. Instead, the nations have been integrated into a single economy, and the integration is becoming more and more complete every year. For the first time in history, we can truly speak of a global economy.
The most dramatic example of this integration was the oil crisis of 1973 and 1974. It came as a great surprise to the public in the industrial nations to discover that they depended so heavily on imported oil. However, the best evidence for the growing integration is the rapid expansion in the volume of world trade. It went up by about 7% a year during the decade from 19
A. they didn’t expect the crisis to occur so soon
B. they couldn’t live without oil
C. they found they were so dependent on foreign countries
D. they realized they were not the stronger nations at all