不满十周岁的人和不能辨认自己行为的精神病人是无民事行为能力人，不能作保证人。

By nine o’clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _______appeared a rare rainbow soon.

A．of which

B．on which

C．from which

D．above which

Nearly three months had gone by _________ the seriously injured girl showed a slight sign of recovery.

A．until

B．before

C．since

D．after

阅读理解。

     Celebrations spread across China when Shanghai, the Oriental Pearl, was given the right to host the 2010

World Expo on December 3.

     Shanghai won the honor after beating rivals from Russia, Mexico, Poland and South Korea.

     "I'm very proud of being Chinese," said Wang Kaibo, a Senior 2 student of the Middle School Affiliated to

Beijing Medical University."The winning of the expo is a victory, not only for Shanghai residents, but for the

people of the whole Chinese nation." Bidding (申办) for the expo shows that China is more confident of playing

a more important role on the international stage. It's competing for large events and the next one could be the

World Cup, Wang said.

     The World Expo 2010 and the 2008 Beijing Olympics will become the twin shining stars of China's

development over the next 10 years, said experts.

     The World Expo is known as "Olympics of the economic, cultural, scientific and technological fields". It is

usually held every five years and lasts for six months.

     The Olympics, World Cup and World Expo are considered three top international events in the world.

     China is the first developing country to win the expo bid in the event's 151-year history.

     Not only will it attract more foreign investment to China, but experts say that the half-year-long exhibition

will bring at least 70 million visitors to Shanghai.

     The World Expo is a great event for different countries to exchange social, economic, cultural and scientific

achievements, and also help to encourage new technology and ideas.

     The expo was first held in London in 1851. It has a history of global influence. 

     The Eiffel Tower, built during the Paris World Expo in 1889, became the symbol of the French capital.

     Many historic inventions, such as the telephone and airplane, all made their first appearance at a World Expo.

1. The winning of bidding for the World Expo 2010 and the 2008 Olympic Games implies _____.

A. China is beginning to play a more important part on the international stage

B. China has played the most important role in the international affairs

C. China has become a developed country ever since 53

D. China is the first Asian country to win the expo bid in history

2. As we know, in general, the World Expo is usually held every years, while the Olympics

is usually held every ____ years.

A. 4; 5

B. 5; 4

C. 4; 4

D. 5; 5

3. By bidding for the expo and the Olympics, we are sure that _____.

A. China will beat rivals from Russia, Mexico, Poland and South Korea

B. China will become a super country in the United Nations

C. China will build a famous tower like Eiffel Tower as the symbol of the capital

D. China will develop more quickly than before and will benefit a lot from them

220kV及以上电网的所有运行设备都必须由（）套交、直流输入、输出回路相互独立，并分别控制不同断路器的继电保护装置进行保护。

A、两

B、三

C、五

D、四

未及时清理障碍物导致业主受到伤害，物业管理公司应承担责任吗？