Diseases that can spread from one person to another are called infections (传染病). A UN health expert
warns that a new flu pandemic (世界性的流感) is coming. How do such diseases go round? Some diseases
go round in one way. Some in many ways.
     For example, the virus (病毒) that make you catch a cold can travel from one person to another through
cough. They are breathed in with the air. That is a good idea to stay away from people who have a cold. What
seems to be a cold may be the beginning of some more serious diseases.
     Virus travel from one person to another in many ways. Some diseases are carried by insects, such as flies
and mosquitoes (蚊子).
     Larger animals can also carry diseases. People can get diseases from dogs or even rabbits. At one time
many people got TB (肺结核) by drinking milk form cows that had the disease. Today, milk is made safe. The
milk is heated and made cold.

(     )1. Diseases can go round only in one way.
(     )2. When you catch a cold, you don't need to stay away from people.
(     )3. A cold may cause some other serious diseases.
(     )4. Flies are useful insects because they can carry some diseases to people.
(     )5. If a person drinks the milk which is from a sick cow, he may have the disease as well.

     Here are two cars. They may some day (1)_____ the place of today's big cars. If we use such cars in
the (2)_____, there will be less pollution in the air. There will be more (3)_____ for parking cars in cities, and
the streets will be less crowded. Three such cars park in the space that is needed for one of today's cars.
    The little cars will be very cheap. They will be very safe, too, because these little cars can go at a (4)_____
of only 65 kilometers per hour.
     The cars of the future will be fine for getting around a city, but they will not be useful for long trips. If the
car is powered by electricity, it will have two batteries-one battery (蓄电池) for the motor and the other for the
lights, signals, etc. If the little cars run on gasoline (汽油), they will go 450 kilometers before they need to stop
for more gasoline.
    If big cars are still used along with the small ones. We must (5)_____ two sets of roads, one for the big,
 (6)_____ cars and the other for the (7)_____, slow ones.

1. 根据上下文填词，完成短文，每空一词。

(1)______(2)______(3)______(4)______(5)______(6)______(7)______

2. 根据短文内容将句子补充完整。

(1). If we use these little cars in the future, there will ______ in the air.
(2). In the space for one of today's cars we will be able to park ______.
(3). The cars of the future will be fine for ______.
(4). If small cars are used along with today's big ones, we must build two sets of ______.

     Plants are very important. This is because plants can make food from air, water and sunlight. Animals
and man can not make food from air, water and sunlight. Animals can get their food by eating plants and
animals. Man gets his food by eating plants and animals, too. So animals and man need plants in order to
live. This is why there are so many plants around us.
     There are two kinds of plants: flowering plants and non-flowering plants. You can know some trees
from their flowers and fruits. Non-flowing plants do not grow flowers. You can not see many non-flowering
plants around you.
     If you look carefully at the plants around us, you will find that there are many kinds of plants. Some
plants are large and some are small. Most of them are green. Thanks to (多亏了) the plants around us we
can live on the earth.

1. Which of the following is the most important to man according to the passage?

A. Fruits.
B. Plants.
C. Animals.
D. Flowers.

2. We need many plants around us because _______.

A. plants can grow easily
B. plants are green
C. we can get what we need from plants
D. we like all kinds of-plants

3. There are much _______ non-flowering plants than flowering plants around us.

A. fewer
B. more
C. larger
D. better

4. Which of the following is TRUE?

A. People can make food from air,water and sunlight.
B. Animals get their food only from eating smaller animals.
C. We know all trees from their flowers.
D. Most of plants are green.

5. The best title for this passage is _______.

A. Food from Plants
B. Plants and Man
C. Man and Animals
D. Plants around Us

     Sometimes, people are not clear about what kind of food is healthy and what kind of food may do harm
to our health. The USDA has prepared a food guide to help people learn about which kind of food is the
healthiest to eat. The food guide describes six main food groups: meat ( like fish and chicken), dairy ( like
milk and cheese),grains (like bread and rice),fruit, and vegetables. The last group is fats and sweets. The
USDA also suggests how much of each food group is healthy to eat daily. Though this guide was prepared
by the US government, it is very useful for people all over the world.
     (1) As a result of years of study, we know that too much animal fat is bad for our health. For example,
Americans eat a lot of meat and only a small amount (量) of grains, fruit and vegetables. Because of the way
they eat, they have a high rate (率) of cancer and heart disease. In Japan, people eat large amounts of grains
and very little meat. The Japanese also have a very low rate of cancer and heart disease. The Japanese live
longer than anyone else in the world. However, when Japanese people move to the US, the rate of heart disease
and cancer goes up as their eating habit changes. And as hamburgers, ice creams and other high-fat foods
become popular in Japan, the rate of heart disease and cancer is going up there as well. (2) People are also
eating more meat and dairy food in other countries, in those countries the disease rate is going up with the
change of people's eating habit. Doctors everywhere suggest people eat more grains, fruit and vegetables and
less meat and dairy food.
     (3) Eating healthily is important for children as well as their parents. When parents have poor eating habits,
their children usually do, too. After all, children eat the same way as their parents. When parents eat healthy
food, the children will learn to enjoy it, too. Then they will develop good eating habits. Doctors suggest parents
give their children healthier food such as fruit, vegetables and juice.
     Everyone wants to live a long, healthy life. We know that the food we eat affects (影响) us in different
ways. For example, doctors believe that fruit and vegetables can really protect people from many different
diseases. On the other hand, animal fat can cause (引起) diseases. We can change our eating habits now and
enjoy many years of healthy living.

1. 将(1)处的句子翻译成汉语。
    ___________________________________________ 
2. 将(2)处的句子改写为含定语从句的句子。 
    ___________________________________________ 
3. 将(3)处的句子改写成同义句。 
    ___________________________________________ 

     You are probably familiar with the saying: An apple a day keeps the doctor away. A recent research
carried out by the Chinese University of Hong Kong may change the saying: An apple a day may keep aging
away.
     The research chose fruit flies (果蝇), as they share many genes (基因) with humans. The fruit flies were
either fed normally or had an apple extract (浓缩物) added to their diet.
     It turned out that those fruit flies that were given apple extract lived about 55 days - five days longer than
the flies that were normally fed. The research group also found it easier for the flies to walk, climb and move
about as they aged.
     According to the result, the researchers believed that the antioxidants (抗氧化剂) in the apple extract
helped clean up dangerous chemicals (化学物质) that cause illnesses, as well as aging.
     In another study, researchers examined diets of thousands of women. They discovered that those who
regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke.
     The apples' genetic code (欲望) was discovered recently. It allows scientists to develop nicer and healthier
fruits. Researchers are already using the information to grow a kind of apples full of antioxidants that can keep
eyes and joints healthy and protect humans against heart illnesses and cancer.
     Apples that kill the desire (欲望) to eat could also be produced, with the first "extra-healthy" apples on
supermarket shelves within just four or five years.
     The team that keeps studying apple DNA includes 100 scientists from five countries. Their research also
suggests that around 65 million years ago, when dinosaurs began to die off, the plant, which would finally
become today's apple tree, experienced a great genetic change. The number of many of its genes doubled.
The extra genes allowed the apple to get used to worse conditions and go through a different development
from peaches, strawberries and other related fruits.

1. Why were fruit flies used for the research?

A. Because they have a similar diet to humans.
B. Because they have a history as long as apples.
C. Because they share a lot of genes with humans.
D. Because they feed on nothing but apple extract.

2. What result did the researchers find out?

A. Apples produce chemicals that can change human genes.
B. Apples have antioxidants that kill chemicals that cause aging.
C. Apples are rich in vitamins that are needed in humans' bodies.
D. Apples produce chemicals that make apples taste more delicious.

3. What happened to apples around 65 million years ago according to the research?

A. Their genes stopped their development as the environment got worse.
B. Their genes became twice in number but they finally died off like dinosaurs.
C. They experienced a great genetic change making them used to worse conditions.
D. They went through a similar development to peaches, strawberries and other related fruits.

4. What can we infer (推断) from the passage?

A. Eating apples may bring us more advantages than we might believe before.
B. People who have the habit of eating apples don't need to see a doctor.
C. Apples that kill the desire to eat are already available in supermarkets now.
D. People will eat apples instead of peaches and strawberries from now on.

     Every time you turn on the television or take a ride in a car,you could be adding to a problem called acid
rain (酸雨). In this article, you'll learn how acid is created, and how it affects us, and more importantly, what
we all can do to prevent it. 
How is acid rain created?
     When people use fuels (燃料), such as coal and gasoline, poisonous gases are give off. When these gases
mix with rain, acid rain forms. Many power stations burn fuels in order to creat 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 mixes with these gases, harmful things called acids form. This is acid rain.
How does acid rain affect us?
     Acid rain damages (毁坏) everything that it touches. It poisons our rivers, ponds, lakes, and oceans along
with all the life in them. It pollutes our soil and crops, harms trees, and can even kill fish and plants. Acid rain
also eats away at buildings.
How can we prevent acid rain?
     We need to cut down on the pollution that gets into our air. Turn off lights, television, and other electrical
appliances if you are not using them, Walk or take a bike whenever possible. If you 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.

1. When power stations burn fuel, ______.

A. acid rain form
B. air pollution is caused
C. noise pollution is caused
D. acid rain gets heavier

2. According to the article, acid rain affects us ______.

A. suddenly
B. slightly
C. seriously
D. immediately

3. What advice does the article give us?

A. Go to school on foot or by bike if we can.
B. Go to bed earlier in order to use less electricity.
C. Travel by bus to prevent acid rain.
D. Turn off the television on rainy days.

4. What is the best title of the article?

A. Preventing Acid Rain
B. Forming of Acid Rain
C. Acid rain, Heavy Rain
D. Acid Rain, Killer Rain

     Years ago, many zoos kept all kinds of animals in small cages. Small cages made it easy for people to
see the animals, but a small cage is not a good place for an animal to live in.
      Today zoos keep animals in different kinds of cages.The cages are very big and open. They usually
have plants and little lake. The cages look like the animals' habits.
     Zoos help to protect all kinds of animals. They protect animals in the zoo and they protect animals
in the wild. How do they do this? Zoos teach people how animals live in the wild. Zoos want people to
help protect the animals' wild habitats.
     Many plants and animals are going extinct (灭绝). Mammoths, which related with the Asian elephants,
are now extinct. There are no mammoths in the world today. Scientists say that seventy-four different
kinds of living things go extinct every day!
      Zoos are working together to stop animals from going extinct.