Plants supply man with food clothing, and shelter-his most important needs.

Many of our most useful medicines are also made (1).......plants.In addition,plants add beauty and pleasure to our lives.Most people enjoy the smell of flowers,the sight field of waving grain,and the quiet of a forest.Not (2)..........plants are helpful to man.Some species grow in fields and gardens as weed that choke off useful plants.Tiny hít of pollen from (3).......plants cause such (4)........as asthma and hay fever.other plants destroy millions of dollars (5)........of crops yearly.

1. A.of B.from C.by D.with

2. A.all B.every C.any D.some

3. A. any B.certain C. most D.all

4. A.accidents B.diseases C.misfortune D.disasters

5. A.worth B.value C.price D.money

Plans grow(46) almost every part of the world. We see(47) plants as flowers, glass, and tree nearly every day. Plants grow high on moutaintops, far in the oceans, and in many deserts and(48) regions

Without plants, there could be not life on earth. Man could not live without air of food and so he could not live without plants. The oxygen in the air we breathe comes from plants. The food we eat also comes from plants or from animals that eat plants. We build houses and make many(49) products from lumber cut from trees. (50) of our clothing is made from the fitbers of the cotton plants.

Scientists belive there are more than 350,000 species of plants, but no one knowns for(51). Some of the smallest plants, called diatoms, can be seen only with a(52). A drop of the water may hould as many as 500 diatoms. The largest living things are the giant sequoia trees of California. Some of them stand more than 290 feet high and measure over 30 feet wide

Scientist(53) all living things into two main groups - plants and animals. It is usually easy to tell the two(54). Almost all kinds of plants stay in one place, but nearly all species of animals move about under their own power. Most plants make their own food from air, sunglight, and water. Animals cannot make their own food. The basic units of all life, called cells, are also different in plants and animals. Most plants have thick wall that(55) a material called cellulost. Animal cells dl not have this material.

Ae giúp mjk nhanh với

Use your own idea to complete the following sentences:

If we keep hunting animals, ........................................

If we cut down all the trees, ........................................

Read the text and say these statementa are true or false:

Land pollution:

If we don'recycle plastic and glass, they stay in the ground for a long time. Dangerous chemicals can also go underground, where they are harmful to plants and animals. Whenever we recycle bottles and cans, we reduce land pollution.

Airpollution:

Some power plants and factories put pollution into the air. Cars trucks and planes can also cause air pollution. Whenever we ride a bike or keep the air conditioner low, we reduce air pollution.

Waterpollution:

The same plastics and chemicals that are harmful to our land can also be found in our ocean, rivers and lakes.

Whenever we recycle garbage or shut off the water pollution. 

Write True(T) or False(F):

1.Plastics, glasses and chemicals underground are harmful to plants and animals.

2. Land pollution is cause by dangerous chemicals in the ground.

3. We should recycle plastic and glass to reduce land pollution.

4. Air pollution only cause by cars, trucks and planes.

5. We can reduce air pollution by building more power plants and factories.

6. Water pollution is causes by some plastics and chemicals in the seas, rivers and lakes.

7. We recycle garbage and shut off the water to increase water pollution.

Ai nhanh mik tick cho tick.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

 Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.

From “global warming” by Michael Mastrandrea and Stephen H.Schneider

Scientists have observed that warmer temperatures in the spring cause flowers to ________.

A. bloom earlier

B. die instantly

C. become lighter

D. lose color

Yosemite National Park, located in the eastern central region of California, covers an area of 761,266 acres which includes the slope of the Nevada mountain chain. It is about six hours north of Los Angeles and is known internationally for its natural features like the great cliffs, waterfalls, streams and flora to fauna diversity. That is why more than 3.5 million people visit this park every year.

More than 95 percent of Yosemite National Park has wildlife in it, including five types of vegetation zones: oak woodland, lower and upper montane, subalpine and alpine. The park is one of the largest habitat centers in all of Nevada and it has an elevation range of 600 to 4,000 meters. There are also huge rocks that are more than 10 million years old scattered throughout the natural areas.

For tourists, there are also several hotels and accommodations throughout the park, including restaurants and shops. Many visitors enjoy visiting during the summer to enjoy everything the park has to offer.

* Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 24 to 30.

  Thirty years ago, Lake Ponkapog in Hartwell, New Jersey, was full of life. Many birds and animals lived beside the water, which was full of fish. Now there are few birds, animals, and fish. The lake water is polluted. It is a dirty brown colour, and it is filled with strange plants.

  How did this happen? First, we must think about how water gets into Lake Ponkapog. When it rains, water comes into the lake from all around. In the past, there were woods all around Lake Ponkapog, so the rainwater was clean.

  Now there are many homes on the lake shore. People often use the chemicals in their gardens. They use other chemicals inside their houses for cleaning and killing insects. There are also many businesses. Businesses use chemicals in their machines or stores. Other chemicals fall onto the ground from cars or trucks. When it rains, the rainwater flows by these homes and businesses. It picks up all the chemicals and then pours them into the lake. They pollute the water and kill the animal life.

  There is still another problem at the lake: exotic plants. These plants come from other countries. They have no natural enemies here, and they grow very quickly. In a short time, they can fill up a lake. Then there is no room for other plants. The plants that normally grow there die. These plants gave many animals and fish their foods or their homes. So now those animals and fish die, too.

  People in Hartwell are worried. They love their lake and want to save it. Will it be possible? A clean lake must have clean rainwater going into it. Clean rainwater is possible only if people are more careful about chemicals at home and at work. They must also be more careful about gas and oil and other chemicals on the ground.

(“Reading Power ” by Beatrice S. Mikulecky/Linda Jeffries - Longman)

 Exotic plants grow quickly because they___________.

A. make the water dirty

B. have no natural enemies 

C. are large and strong

D. have a lot of water