. China and the United States held their first strategic dialogue on August and to increase co-operation and constructive relations. A. agreed B. would agree C. have agreed D. had agreed 题目和参考答案——青夏教育精英家教网—

Thousands of years ago people guessed the time of day by watching the sun.

Later，they found it was easier to tell the exact time by looking at the shadows.Thus， the sundial(日晷) was invented.

The sundial proved a useful timepiece in sunny weather. However，another typc of timepiece was necessary for cloudy weather and nigh time.A sand glass was another common measurer of time.Two glass bottles were connected by a very small opening. The top bottle was filled with sand，which dropped slowly into the botton one in a certain period of time.Hour glasses were widely used then.Three—minute sand glasses are still used in many homes to time the boiling of eggs.

The real ancestor of modern clocks was the water clock.In China ,an early water clock was made up of several bowls. Water trickled(滴) from one bowl to another to keep the clock going. Visitors to the Beijing Palace Museum can still see the old water clocks showing the time there.

In the Middle Ages a wateless clock was invented which worked by means of weights. To keep the weight falling at the same speed，a system of wheels was invented. The pendulum(钟摆) was soon developed to control the speed of the wheels. Thus the modern form of clock came into being.

9.Which of the following is the correct picturr of a sand glass?

A. B. C. D.

10.Three minute sand glasses are still used in many homes .

A.to boil eggs B.to measure the time of boiling eggs

C.to hold the boiled eggs D.to have eggs boiled

11.If you visit Beijing Palace Museum, you .

A.will see the old water clocks broken

B.will find the time shown by the old water clocks is wrong

C.can find the old water clocks still telling the time there

D.will find the old water clocks have gone

12.In the Middle Ages the weight falling speed of a clock was kept by .

A.several bowls B.a system of wheels

C.a system of pendulum D.several springs

AIDS’ Threat to Asia Grows

NEW DELHI----Just a few years ago, Mala was a typical middle-class Indian housewife. She cooked, cleaned and looked after her two small children.

Last year, her life took a tragic turn. Her husband died of AIDS; she was found out HIV-positive and her mother-in-law took her children away from her, saying they would get the disease. “When friends dropped for a visit, she would introduce me, saying, ‘She is my son’s widow. She has AIDS,’” said Mala. AIDS is now described as “explosive(炸药)” around the world. A study of a hospital in the port city of Durban in South Africa, where the world’s biggest and Africa’s second AIDS conference opened last Sunday, found that almost half the beds in medical wards (病房) were occupied by AIDS patients.

South Africa has one of the world’s fastest growing HIV infections, with 1,700 people infected daily, adding to the 4.3 million, or 10 percent of its population, living with HIV. Until now, Asia has been more successful in holding the AIDS virus than Africa, where the disease has killed about 12 million people.

AIDS is now threatening to surround many of Asia’s poverty-stricken countries. Countries in Asia, such as Cambodia, and Thailand, have HIV infection speeds over 1 percent. But the low speeds hide huge numbers of infected people, because of the population base.

In India, for example, 3.7 million are infected, more than in any other country except South Africa. In China, an estimated 860,000 people (the actual number may be a little larger), mainly drug users, live with HIV/AIDS. Gordon Alexander, a senior advisor for UN AIDS in India, estimates that the number hit by AIDS in Asia will climb about eight million over the next five years from about six million.

In many Asian countries, the battle against HIV is a social and cultural one against public discussion of sexual health put a nationwide media campaign into action to limit the speed of HIV through unsafe sex. Brenton Wong, an official for Singapore’s Action for AIDS, says the actual HIV incidence in the city state of 3.9 million people is at least eight times higher than official data. “Shame and deny is still very, very common so people are afraid to get tested and many times won’t even tell their families if they test positive,” said Wong.

We can conclude from the underlined sentence in the last paragraph that ______.

A. The official data always tell lies and cheat people to hide the truth.

B. 3.9 million people in Singapore suffered from AIDS.

C. Singapore has a population of 3.9 million

D. The number of people infected with HIV is at least eight times larger than that of the AIDS patients in Singapore.

It is judged that there are ______ people hit by AIDS in Asia or so.

A. 4.3 million B. 6 million C. 8 million D. 3.7 million

According to the passage, the main reasons that AIDS spread in Asia is through_______.

A. blood B. unsafe sex C. love D. drugs

Which of the following statements is not right?

A. The battle against Aids in many Asian countries is against their culture and

social customs.

B. Though the HIV infection in Asia develops with low speed, the infected number

is still quite large compared to other continents.

C. India has the second largest number of HIV infected people.

D. Aids might affect the poverty-stricken countries more severely.