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Dear Peter,
I’m glad to receive your letter. Thank you for your caring a? ?? the weather and my health. Now I’d like to tell you something about the smog（雾霾）.
Since the winter last year, the smog has taken place for several times. It has done great harm(伤害) to our d???? life. Many traffic accidents have happened because of the h???? smoggy weather. More and more people have to go to see a d???? because of the serious diseases(疾病) caused by the smog. Quite a lot of flights have to be put off. A great number of people have to s???? at home for fear of the poisonous(有毒的) air caused by the smog.
People have realized(意识到) the great harm caused by the smog and the importance of
p? ? the environment. People from all over the country are taking a? ? to improve the smoggy weather. The government asks people to go to work or school with public traffic tools, such as the bus and the u? ? . Also we should plant more trees.
According to me, I will go to school by bike or on foot, and I won’t throw the waste anywhere. M? ? , I will tell people that all of us should protect the environment as p? ? as we can. Would you like to tell me some good ideas? I’m looking forward to your reply.
Yours,
Wang Hua
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Overhead bridges can be seen in many parts of Singapore. Overhead bridges are in the places where traffic is very heavy and c____【小题1】___the road is not safe. These bridges can help people cross roads safely．Overhead bridges are u____【小题2】___ in very much the same way as zebra crossings．They are more efficient（效率高的），though l____【小题3】____convenient（方便的）because people have to climb up a lot of s____【小题4】____. This is inconvenient to the old．When people use an overhead bridge，they do not hold up traffic．But when they cross a busy road using a zebra crossing，traffic is held up．This is w___【小题5】__ the government has built many overhead bridges to help people and k __【小题6】____ traffic moving at the same time. The government of Singapore has saved a lot of m____【小题7】____ to build these bridges．For their own safety，people should use them i____【小题8】__of rushing across the road．Old people may find it a little difficult, but it is much safer than walking across the road with all the moving t_____【小题9】__．Overhead bridges are very useful. People, both old and young, should always use them．This will stop accidents from h ___【小题10】__．Are there any overhead bridges in your city? 查看习题详情和答案>>
We are all busy talking about and using the Internet (互联网), but how many of us know the h____1___ of the Internet?
Many people are surprised when they find that the I___2_ was set up in the 1960s. At that time, computers were large and e__3___ . Computer networks (网络) didn't work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be good e__4___ to be used by many different computers. If part of the network was not working, information could be sent through a__5_ part. In this way computer network system would keep on w___6___ all the time.
At f_7_ the Internet was only used by the government, but, in the early 1970s, universities, hospitals and banks were allowed to use it too. H_8__, computers were still very expensive and the Internet was d__9__ to use. By the start of the 1990s, c__10_ became cheaper and easier to use. Scientists had also developed software that made 'surfing' (浏览) the Internet more convenient.
Today it is easy to get on-line (上网) and it is said that m__11__ of people use the Internet everyday. Sending e-mail is more and more p__12__ among students.
The Internet has now become one of the most important parts of people's life.
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stay in school (1)u they are sixteen. Most students are seventeen or eighteen years old when
they (2)l high school. There are (3)t kinds of school in the United States: public school
and private school. (4)M children go to public schools. Their parents do not have to (5)p
for their education because the schools receive money from the government. If a child goes to a private
school, his parents (6)h to pay enough money for his schooling. Some parents still choose private
schools, though they are much more (7)e . ?
Today about half of the high school students go to universities (8)a they finish the high school.
A student at a state university does not have to pay too (9)m if his parents live in this state. ?
But many students work while they are studying at universities. In this way they can have good working
habits and live by their own (10)h .
of the Internet?
Many people are surprised when they find that the I__2__ was set up in the 1960s. At that time,
computers were large and e__3__ . Computer networks (网络) didn't work well. If one computer in
the network broke down, then the whole network stopped. So a new network system had to be set up.
It should be good e__4__ to be used by many different computers. If part of the network was not
working, information could be sent through a__5__ part. In this way computer network system would
keep on w__6__ all the time.
At f__7__ the Internet was only used by the government, but, in the early 1970s, universities, hospitals and banks were allowed to use it too. H__8__, computers were still very expensive and the Internet
was d__9__ to use. By the start of the 1990s, c__10__ became cheaper and easier to use. Scientists
had also developed software that made 'surfing' (浏览) the Internet more convenient.
Today it is easy to get on-line (上网) and it is said that m__11__ of people use the Internet everyday. Sending e-mail is more and more p__12__ among students.
The Internet has now become one of the most important parts of people's life.