When the tragedy struck me during the Depression (大萧条), my father did the only thing he could.

The tragedy happened in the year 1933. I was only 6 years old when I was rushed to the hospital with two crushed feet. My parents were told I might never walk again.

The accident happened when I was sitting in front of our house in Lowell, Massachusetts. I was playing in a puddle (水坑) after a rainstorm when I felt a huge weight on my feet. When I looked up, there was a car tire on my feet. I cried out, but the motor was running and no one could hear me over the engine.

The driver had run across the street for a newspaper. When he got back to his car, he drove away — never knowing he had parked on my feet.

Just about then, our neighbor’s son came home and saw me bent over my feet in pain. He immediately carried me home, and I remember thinking how tall and strong he was.

An ambulance came, and I remained in the hospital for 3 weeks while my feet were “repaired”. When I returned home, I could hardly walk.

I sat in our bay window and watched the children play on the street and longed to join them...but I couldn’t. I felt so left out despite my parents’ company.

My parents were told that if I was ever to walk again, I’d need treatment, which in those days meant riding a tricycle (三轮车) to strengthen the muscle and eventually get my feet back into condition for walking.

Our family couldn’t afford such an expensive thing. Times were tough during the Depression, and there were five mouths to feed, besides buying coal and wood for the stove.

Dad couldn’t afford the bus fare and on cold winter days he walked 7 miles every day in his only winter coat to get to work. No, there was no money for a tricycle. I would be a disabled person all my life.

China plans to complete the construction of a space station and have    1    put into operation around 2022, said Zhou Jianping, the chief designer of China's manned space program, at a forum (论坛)    2    (hold) in south China's Guangdong Province. The space station,    3    could be enlarged if needed,    4    (design) to weigh 100 tonnes and accommodate three astronauts, according to Zhou.

“The main goal of the construction or the space station is to enable China to become a country    5    (independent) mastering the technology for long term manned flight in near Earth space, and having the capacity to carry out long-term manned scientific    6     (experiment) in near Earth space and comprehensive development and utilization (利用) of space resources,"    7    (say) Zhou at the 4^th China Summit Forum on Human Factors Engineering, which was held at SunYat-sen University from Saturday to Sunday.

The space station will be built as China’s main platform for space science research    8    the intention of mastering the technologies in constructing and    9    (operate) large space facilities, the technologies that guarantee life and health of astronauts who often fly in orbit, and the construction of a    10    (nation) space lab, according to Zhou.

I'm writing to tell you about how we students use computers in our daily lives. Some use them in a good way when some others don't. As far as I am concerned, more and more students now use computers   help with their study. If we meet some difficulties when they are doing their homework, they always got help from the Internet. To spend their spare time, they look for more informations with the computers to have much more knowledge. At the same time, however, the great number of students are still so interested in PC games and chatted with others on the Internet that they can not return to their study. They are really in dangerous. Computers can either do good and harm to us.

Best wishes.

Yours truly,

Li Hua

10 . HOW BIG should a business team be?It is an enormously important issue for companies, Teams that are too small may lack the skills required to get the job done:teams that are too big may be impossible to co-ordinate.

Robin Dunbar.an anthropologist at Oxford University,has done a lot of work on primate(灵长目）groups.His argument is that the size of the group is linked to the size of the brain.With their large brains,humans can cope with larger bands,A larger social group has many advantages,allowing for greater protection and specialization.

Whereas 150 is sometimes referred to as the"Dunbar number",the academic himself in fact refers to a range of figures.He observes that humans tend to have five intimate friends,15 or so good friends,around 50 social friends and 150-odd acquaintances.

Running a larger network can be difficult.The armed forces have spent more than 1,000 years experimenting with unit size.A Roman centurion(百天长）oversaw 100.The modern American army company has 180 members.Britain's equivalent numbers 120.These are rough estimates,rather than fixed figures.But it is striking that many group activities seem to be close to a Dunbar number. The Special Air Service of Britain has four-man patrols;when your life depends on it,you need to have absolute trust in your colleagues.As a result,such groups are limited in size.

For much of economic history,work was conducted in small units by peasants,tenant farmers and craftsmen.The coming of powered machinery enabled production at a much larger scale,with workers crowded into factories.These days the rise of the service economy means that workers are no longer concentrated in such large groups.

This may not be a bad thing.It was easy for employees in large factories to regard remote company owners as "them"rather than"us".The modern company may settle on a model with a small group of"core"workers and a larger group of contract workers.The result may be more united within the core staff but the non-core staff may be less well treated.The small core teams may work effectively.The big question will be the effect on morale of those outside those teams.