Nationalparksarelargeofareasof-优题课

Every time we turn on the TV or take a ride in a car, we could be adding to a problem called acid rain(酸雨). In this article, we’ll learn something important about acid rain.
The formation of acid rain
When people use fuels (燃料), such as coal and gasoline(汽油), poisonous gases are given off. When these gases come together with rain, acid rain forms. Many power stations burn fuels in order to create the electricity(电) that we use in our homes and offices every day. Cars and trucks also send these gases into the air when they burn gasoline. When rain meets these gases, harmful things called acids form. This is acid rain.
The harm of acid rain
Acid rain destroys everything that it touches. It poisons our rivers, ponds and lakes and oceans along with the life in them. It pollutes our soils and crops, harm trees, and can even kill fish and plants. Acid rain also eats away at our buildings.
The prevention of acid rain
We need to reduce and even stop the pollution that gets into our air. Turn off lights, televisions and other electrical appliances(电器) if we are not using them. Walk and take a bike whenever possible. If we are travelling a long distance, take a bus or train to save fuel.
As research shows, acid rain harms our environment. But people everywhere can take small steps now to help protect our environment for future generations.

Whenever we use electricity or drive our cars we may add something bad to the air around us. And even worse, we may cause a terrible problem—acid rain.
The formation of acid rain	When fuels, such as coal and gasoline are burnt, harmful gases are sent into the air. When these gases with rain, acid rain forms.
The harm of acid rain	Acid rain is greatly to the environment. It makes our rivers, ponds and lakes and oceans dirty and the death of fish and plants. And it can corrode (腐蚀) the buildings we live in.
The prevention of acid rain	Trying to prevent the pollution that gets into the air is . Keep the electrical appliances off while they are not in use. We can also use different ways of traffic to make less use of fuels.
Research tells us that acid rain harms our environment. So people around the world can take small steps now to make a to our kids.

If we are asked exactly what we were doing a year ago, we should probably have to say that we could not remember. But if we had kept a book and had written it in an account(陈述) of what we did each day, we should be able to give an answer to the question.
It is the same in history. Many things have been forgotten because we don’t have written account of them. Sometimes men did keep a record of the important happenings in their country, but it was often destroyed(破坏) by fire or in a war. Sometimes there was never any written record at all because the people of that time and place did not know how to write. For example, we know a great deal about the people who lived in China 4,000 years ago, because they could write and leave written records for those who lived after them. But we know almost nothing about the people who lived even 200 years ago in central Africa because they had not learnt to write.
Sometimes, even if the people cannot write, they may know something of the past. They have heard about it from older people and often songs and dances and stories have been made about the most important happenings, and those have been sung and acted and told for many generations(代), for most people are proud to tell what their fathers did in the past. This we may call “remembered history”. Some of it has been written history because words are much more easily changed when used again and again in speech than when copied in writing. But where there are no written records, such spoken stories are often helpful.
Which of the following ideas is NOT included in the passage?

A．“Remembered history” is less reliable (可靠的) than written history.

B．Written records of the past play an important role in our learning of the human history.

C．A written account of our daily activities helps us to be able to answer many questions.

D．If there are no written records, there is no history.

We know very little about the central Africa 200 years ago because ________.

A．there was nothing worth writing down at that time

B．the people there paid no attention to the importance of keeping a record

C．the written records were perhaps destroyed by fire

D．the people there did not know how to write

“Remembered history” is considered as valuable only when ________.

A．it is written down	B．there is no written account
C．it proves to right	D．people are interested in it

The passage suggests(暗示) that we could have learnt much more about our past than we do now if the ancient people had ________.

A．kept a record of every past event

B．not burnt their written records in wars

C．told the exact stories of the most important happenings

D．made more songs and dances

Spending two or three hours playing outdoors each day can reduce the chance of becoming short-sighted, a research shows. It challenges the belief(信念) that short-sightedness is caused by computer use, watching TV or reading in weak light.
The Australian government researchers believe that the sunlight is good for people’s eyes. They compared the vision(视力) and habits of 100 seven-year-old children in Singapore and Australia. In all, 30% of the Singaporean children were short-sighted—this rate(比率) was ten times higher than Australian children.
Both groups spend a similar amount(数量) of time reading, watching television and playing computer games. However the Singaporean children spent an average (平均) of only half an hour a day outdoors—90 minutes less than the Australian children.
Professor Ian Morgan, from the Australian Research Council’s vision Centre, said, “Humans are naturally long-sighted, but when people begin to go to school and spend little or no time outdoors, the number of short-sighted people gets larger. We’re also seeing more and more short-sighted children in cities all around the world and the main reason may be that city children spend less time outdoors.
Daylight can be hundreds of times brighter than indoor light. But why does playing outside prevent us from becoming short-sighted? Scientists believe that natural light has a special chemical(化学物质) which stops the eyeball from growing out of shape and prevents people from becoming short-sighted.
So be outdoors. It doesn’t matter if that time is spent having a picnic or having sports.
How much time did the Australian children spend outdoors on average according to the research?

A．30 minutes.	B．60 minutes.
C．90 minutes.	D．120 minutes.

Which of the following is TRUE according to the passage?

A．If people spend less time outdoors they will certainly become short-sighted.

B．There are fewer short-sighted Singaporean Children than Australian children because they have more knowledge of protecting their eyesight.

C．There will be fewer risks of getting short-sighted if people spend two or three hours a day playing outside.

D．When people begin to go to school they will become long-sighted.

What is the fifth paragraph mainly about?

A．Why natural daylight has a special chemical.

B．Why daylight prevents people from becoming short-sighted.

C．Why daylight is much brighter than indoor light.

D．What the special chemical which can stop eyeballs from growing out of shape is.

In which order did the story happen?

A．a-b-c-d	B．d-b-a-c
C．c-d-b-a	D．d-b-c-a

What does “She has a very good eye” mean?

A．She doesn’t need glasses.

B．She can only see with one eye.

C．She needs people to help her see things.

D．She does well in designing things.

What does the woman think about opening a company?

A．She doesn’t think it is possible.

B．She’s very interested in the idea.

C．She wants the man to be her partner.

D．She thinks there’s a good chance it will happen.

This April is a busy month in Shanghai. There’s a lot to do. Here is some information.
Live Music - Late Night Jazz
Enjoy real American jazz from Herbie Davis, the famous trumpet (小号) player. This is Herbie’s third visit to Shanghai. The first two were sold out, so get your tickets quickly.

Scottish Dancing
Take your partners and get ready to dance. Scottish dancing is fun and easy to learn.

Exhibitions - Shanghai Museum
There are 120,000 pieces on show here. You can see the whole of Chinese history there.

Dining - Sushi(寿司) in town
Sushi is getting really big in Shanghai. In Japan, it’s become an art form. The most famous Sushi ‘artist’ is Yuki Kamura. She’ll be at Sushi Restaurant all of this month.

For a full listing of events, see our website.
Suppose you are going to attend an activity at 8: 00p. m. on Saturday, which one can you choose?

A．Live Music - Late Night Jazz

B．Scottish dancing

C．Exhibitions - Shanghai Museum

D．Dining - Sushi in town

Which of the following is TRUE according to the advertisements?

A．Scottish dancing is so interesting and easy that you will never get bored.

B．The performance given by the American jazz will last for over two weeks.

C．Sushi is not popular in Shanghai as it is a kind of Japanese traditional food.

D．It is more interesting to visit Shanghai Museum for Japanese history.

From the text we may learn that Kamura is _________.

A．a cook	B．a waitress
C．an actress	D．an artist