Circle A, B, C or D as the best choice to complete ach sentence

1. The river has been ....... with toxic waste from local factories

A. pollution B pollute C. polluting D.polluted

2. National park helps to ....... endangered animals.

A. protective B. protection C. protect D. protectively

3. A forest fire ....... valuable wood, wildlife and good soil in Camau some years ago.

A.destroyed B. destruction C. destroys D. destroying

4. each year about 5,000 species of plandts and animals are .......

A. eliminate B. eliminated C. elimination D. eliminating

5. We are now facing the problem of .......

A. forestation B. deforestation C. destroys D. destroying

6. A .......is a person working inthe forest, taking care of trees and planting new ones.

A. forester B. planter C. worker D. camper

7. The heavy rain has caused........ in many parts of the country

A. crops B. floods C. water D. soil

8. A(n) ......... dam uses the power of water to produce electricity.

A. electric B. wind power C. solar D. hydroelectric

9. Water ......... held on land by vegetation.

A. were B. are C. can be D. have

10. All the plants nd animals need a constant .........of water to live.

A. offter B. borrow C. supply D. provide

    River pollution occurs when pollutants are not removed from sewage and are discharged into the river. River water is a very important source of freshwater required to sustain life. We need a constant supply of fresh water for drinking, cooking and washing. Animals living near the river, as well as fishes and aquatic plants, also depend on clean river water.

       When heavy rainfall occurs, pollutants accumulated within the boundaries of the catchment area may be washed into river channels. These pollutants include a variety of agrochemicals like fertilizers and insecticides.

       Waste water containing cleaning detergents, oil and other pollutants like industrial waste may be discharged into the river channel through our drainage systems. Industrial waste may contain sulfur, resulting in increasing the acidity of the river water. Sometimes, rubbish such as plastic bags and bottles, are also washed into the river channel.

Answer the questions below:

1. When does river pollution occur?

       __________________________________________________________________________

2.    What is the important role of fresh water to humans and animals?

       __________________________________________________________________________

3.    What happens when heavy rainfall occurs in a polluted area?

       __________________________________________________________________________

4.    How may waste water be discharged into the river?

       __________________________________________________________________________

5.    What is the effect of industrial waste on the environment?

       __________________________________________________________________________

I. Reading comprehension

It is very difficult for man to live without the animal's help. Their role in the balance of nature ranks as their most important service to man. Animals also help man by supplying him with many foods and other useful products. Man wouldn't have any meat, milk,eggs or silk,wool,fur,etc...without animals. For thousands of years man has caused changes in the animal kingdom greatly. He has tamed many kinds of animals and used them for food and clothing. He has killed or driven away animals but today he tries to protect animals that are in danger of extinction. Like man , most plants depend on animals for many of their basic needs. Without animals,many plants couldn't easily reproduce. For example, many plants with flowers depend on bees and other insects carry their pollen from plant to plantb or birds often fly from one place to another with see clinging to their feet.

1. Animal are very important to man because....

A. They make the earth really interesting

B. They play a role in the balance of nature

C. Man enjoys looking at them inthe zoos

D. Man likes hunting them for pleasure

2. Animals supply man with.....

A. Foods as meat,milk,eggs,...

B. Materials such as wool, fur or silk

C. Many different kinds of useful products

D. All are correct

3. In the long history for thousands of years....

A. Man and animals have been best friends

B. Man has caused big changes to animal life

C. Animals have affected greatly on man's life

D. Ther hasn't been relation between man and animals

4. In nature,animals.....trees and plants

A. Enjoy eating flowers of

B. Have destroyed many kinds of

C. Also help reproduce

D. Prevent the reproduction of

1. Visitors, especially children, can go to Cuc Phuong National Park to learn how to recognize the ---------species of animals and plants.

A. differ​​B. difference​​C. different​D. differently

2. This national park is _____ because it has plants and animals from both tropical and temperate zones.

A. specially B. special B. specialize D. specialization

3. The giant panda is in danger of becoming extinct. It is an -------species.

A. dangerous​​B. dangerously C. endanger ​D. endangered

4. Trees, grasses, and other plant life play an important part in the _______ circulation of water.

A. natural ​​B. nature​​C. naturally​​D. naturalize

5. Without plants, most water would run off as soon as it falls, taking away ______ soil.

A. value​​B. valuable​​C. valuably​​D. values

6.The earth is being threatened and the future looks _______.

A. bad​​​B. badly​​​C. badness​​D. worsen

7. Man is _______ doing harm to the environment.

A. constancy​​B. constant​​C. constantly​​D. constants​

8. A campfire near a heap of leaves may _____ cause a forest fire.

A. ease​​​B. easy​​​C. easily​​D. eases

Mark the letter A, B, C, D on our answer sheet to show the underlined part that need correction

Salmon lay their eggs, and die in freshwater although they live in salt water when most of their adults lives

A. although 

B. lay 

C. adult lives

D. when

Giúp mình vớiiiii

I/ Choose the word whose main stress is placed differently from the others in each group:

1/ A. vegetation B. eliminate C. disappearance D. intonation

2/ A. photo B. rapid C. pattern D. about

3/ A. environment B. understanding C. population D. conservation

4/ A. impossibly B. especially C. naturally D. importantly

5/ A. medical B. pollutant C. imprison D. protective

6/ A. conserve B. disease C. wildlife D. expand

7/ A. illness B. slowly C. spoken D. police

8/ A. correction B. motorway C. addition D. erosion

9/ A. damage B. pollute C. defense D. erode

10/ A. power B. autumn C. allow D. order

II/ Select the synonym of the following bold and underlined word in each sentence in the unit:

1/ To conserve electricity, we are cutting down on our central heating.

A. protect B. hold C. make D. do

2/ The loss of much forest is destroying Earth’s plant and animal variety.

A. consuming B. demolishing C. erasing D. removing

3/ The loss of much forest is destroying Earth’s plant and animal variety.

A. change B. kind C. type D. collection

4/ This is especially worrying when there are about 3,000 plants with values as medicines against cancer, AIDS, heart disease and many other sicknesses.

A. well B. suddenly C. particularly D. highly

5/ This is especially worrying when there are about 3,000 plants with values as medicines against cancer, AIDS, heart disease and many other sicknesses.

A. annoying B. hurting C. caring D. fearing

6/ This is especially worrying when there are about 3,000 plants with values as medicines against cancer, AIDS, heart disease and many other sicknesses.

A. illness B. disorder C. derangement D. derangement

7/ Man and most animals need a constant supply of water to live.

A. uniform B. changeless C. true D. steady

8/ Without plants, most water would run off as soon as it falls, taking away valuable soil.

A. costly B. estimable C. cherished D. admirable

9/ But we can stop adding the problem while scientists search for answers, and laws are passed in nature’s defense.

A. frisk B. rifle C. track D. examine

10/ Each year about fifty hundred species of plants and animals are already being eliminated.

A. dropped B. removed C. kicked D. tossed

IV/ Select the antonym of the following bold and underlined word in each sentence in the unit:

1/ I'm not being lazy - I'm just conserving my energy for later.

A. using up B. shooting off C. going out D. throwing away

2/ This is especially worrying when there are about 3,000 plants with value as medicines against cancer, AIDS, heart disease and many other sicknesses.

A. unimportantly B. normally C. balefully D. infamously

3/ We may never know the true cost of this destruction.

A. imaginary B. dishonest C. unlawful D. disloyal

4/ Man and most animals need a constant supply of water to live.

A. fitful B. faithless C. uncertain D. weak

5/ Rapid run-off would cause frequent floods and leave little water during fry seasons.

A. Bad B. Weak C. Slow D. Ugly

6/ Rapid run-off would cause frequent floods and leave little water during fry seasons.

A. sometimes B. unusual C. irregular D. little

7/ The earth is being threatened and the future looks bad.

A. done B. made C. defended D. varied

8/ We cannot clean up our polluted rivers and seas overnight.

A. cleared B. purified C. honored D. respected

9/ We can do something to save the earth.

A. waste B. kick C. shoot D. throw

10/ At times, this can be risky, and the keepers have been injured and one has been killed.

A. good B. useful C. healthy D. secure

V/ Choose the best answer A, B, C or D for each sentence:

1/ The bridge is a marvelous work of engineering and _______.

A. destroy B. destruction C. destructive D. destructively

2/ Work on the production line is monotonous and lacks _______.

A. variety B. various C. varied D. variable

3/ He owns a series of _______ across the US and beyond.

A. industries B. industrials C. industrious D. industrialize

4/ He says he'll tell the authorities but it's just an empty ______.

A. threat B. threaten C. threatening D. threateningly

5/ I'm sick of _______-heart liberal politicians.

A. blood B. bloody C. bleed D. bleeding

6/ In the movie, he plays a concerned and _______ father trying to bring up two teenage children on his own. A. sense B. sensitive C. sensible D. senseless

7/ As a child I had an _______ friend called Polly.

A. image B. imagine C. imaginative D. imaginary

8/ Phone me if there are any new _______.

A. develop B. developed C. developing D. developments

9/ If you don't have anything _______ to say, I'd rather you kept quiet.

A. construct B. constructors C. constructive D. construction

10/ A healthy body will be able to fight off the illness ____ without the use of medicine.

A. nature B. natural C. naturalize D. naturally

VI/ Choose the correct words to complete the sentences:

1/ The plot was surrounded by a stone wall and _______ with flowering trees.

A. planted B. destroyed C. eliminated D. worried

2/ For them, the house's main _______ lay in its quiet country location.

A. interest B. value C. conserve D. cost

3/ Farmers were dumping or burying the _______ animals.

A. ill B. sick C. endangered D. diseased

4/ The baby was born with a surprising _______ of black hair.

A. grass B. plant C. tree D. bush

5/ There were so many different _______ of bread that I didn't know which to buy.

A. varieties B. differences C. changes D. types

6/ The bay _______ by the enemy many years ago.

A. was used to be attacked B. used to be attacked

C. was used for being attacked D. used to attack

7/ The report will be read _______.

A. at the conference by Dr. Blake at 3 p.m. B. at the conference at 3 p.m. by Dr. Blake

C. by Dr. Blake at the conference at 3 p.m. D. at 3 p.m. by Dr. Blake at the conference

8/ That man has never been known _______ before.

A. lie B. to lie C. lying D. has lied

9/ Tom is having someone _______ the newspaper to her.

A. bring B. to bring C. bringing D. who brings

10/ We don’t get anyone _______ the kitchen everyday.

A. clean B. to clean C. cleaning D. who cleans

12. They are those that live on or depend on the bottom like the starfish, those that move ________ of water currents and those that are carried along by the currents.

A. independence​B. independent​C. independently​D. dependent

13. Some marine animals are _________ to humans.

A. danger​​B. dangerous​​C. endangered​​D. dangerously

14. You may be surprised at the large ----------- of animals that live in the sea.

A. variety ​B. variously ​ ​C. various D. vary

15. Community police have made a very positive ______ to crime prevention.

A. contribute​​B. contributive​​C. contribution​D. contributively

16. They are investigating the ______ disappearance of a young woman.

A. mystery​​B. mysterious​​C. mysteriously​D. mysteries

17. By the age of eighteen he was completely ______ of his parents.

A. dependence​​B. dependently​C. dependent​​D. depend​

18. The ______ of the seabed is being carried out.

A. investigate​B. investigative​C. investigation​D. investigating

19.For centuries, people have been challenged by the ___________ that lie beneath the ocean.

A. mystery​​B. mysterious​​C. mysteriously​D. mysteries

20.Dolphin population is at stake due to the _______of their habitats and accidental entrapment in fishing nets.

A. pollute​​B. pollutive​​C. pollution​​D. pollutants​

21. Nairobi National Park is Kenya’s smallest park, but you may be surprised at the large ______ of animals that live there.

A. vary​B. variety​C. various​D. variously

22. Visitors, especially children, can go to Cuc Phuong National Park to learn how to recognize the ---------species of animals and plants.

A. differ​​B. difference​​C. different​D. differently

23. This national park is _____ because it has plants and animals from both tropical and temperate zones.

A. specially B. special B. specialize D. specialization

24. The giant panda is in danger of becoming extinct. It is an -------species.

A. dangerous​​B. dangerously C. endanger ​D. endangered

25. Trees, grasses, and other plant life play an important part in the _______ circulation of water.

A. natural ​​B. nature​​C. naturally​​D. naturalize

26. Without plants, most water would run off as soon as it falls, taking away ______ soil.

A. value​​B. valuable​​C. valuably​​D. values

27. The earth is being threatened and the future looks _______.

A. bad​​​B. badly​​​C. badness​​D. worsen

28. Man is _______ doing harm to the environment.

A. constancy​​B. constant​​C. constantly​​D. constants​

29. A campfire near a heap of leaves may _____ cause a forest fire.

A. ease​​​B. easy​​​C. easily​​D. eases

30. A gulf is a term that refers to the ________ of different kinds of animals and plants which make a balanced environment.

A. exist​​​B. existence​​C. existent​D. existed

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 35 to 42.

        Most desert animals will drink water if confronted with it, but many of them never have any opportunity. All living things must have water, or they will expire. The herbivores find it in desert plants. The carnivores slake their thirst with the flesh and blood of living prey. One of the most remarkable adjustments, however, has been made by the tiny kangaroo rat, who not only lives without drinking but subsists on a diet of dry seeds containing about 5% free water. Like other animals, he has the ability to manufacture water in his body by a metabolic conversion of carbohydrates. But he is notable for the parsimony with which he conserves his small supply by every possible means, expending only minuscule amounts in his excreta and through evaporation from his respiratory tract.

        Investigation into how the kangaroo rat can live without drinking water has involved various experiments with these small animals. Could kangaroo rats somehow store water in their bodies and slowly utilize these resources in the long periods when no free water is available from dew or rain? The simplest way to settle this question was to determine the total water content in the animals to see if it decreases as they are kept for long periods on a dry diet. If they slowly use up their water, the body should become increasingly dehydrated, and if they begin with a store of water, this should be evident from an initial high water content. Results of such experiments with kangaroo rats on dry diets for more than 7 weeks showed that the rats maintained their body weight. There was no trend toward a decrease in water content during the long period of water deprivation. When the kangaroo rats were given free access to water, they did not drink water. They did nibble on small pieces of watermelon, but this did not change appreciably the water itent in their bodies, which remained at 66.3 % to 67.2 % during this period.

          This is very close to the water content of dry-fed animals (66.5 %), and the availability of free water, therefore, did not lead to any “storage” that could be meaningful as a water reserve. This makes it reasonable to conclude that physiological storage of water is not a factor in the kangaroo rat’s ability to live on dry food.

Which of the following is NOT a source of water for the desert animals?

A. Desert plants

B. Metabolic conversion of carbohydrates in the body

C. The blood of other animals

D. Streams

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 35 to 42.

        Most desert animals will drink water if confronted with it, but many of them never have any opportunity. All living things must have water, or they will expire. The herbivores find it in desert plants. The carnivores slake their thirst with the flesh and blood of living prey. One of the most remarkable adjustments, however, has been made by the tiny kangaroo rat, who not only lives without drinking but subsists on a diet of dry seeds containing about 5% free water. Like other animals, he has the ability to manufacture water in his body by a metabolic conversion of carbohydrates. But he is notable for the parsimony with which he conserves his small supply by every possible means, expending only minuscule amounts in his excreta and through evaporation from his respiratory tract.

        Investigation into how the kangaroo rat can live without drinking water has involved various experiments with these small animals. Could kangaroo rats somehow store water in their bodies and slowly utilize these resources in the long periods when no free water is available from dew or rain? The simplest way to settle this question was to determine the total water content in the animals to see if it decreases as they are kept for long periods on a dry diet. If they slowly use up their water, the body should become increasingly dehydrated, and if they begin with a store of water, this should be evident from an initial high water content. Results of such experiments with kangaroo rats on dry diets for more than 7 weeks showed that the rats maintained their body weight. There was no trend toward a decrease in water content during the long period of water deprivation. When the kangaroo rats were given free access to water, they did not drink water. They did nibble on small pieces of watermelon, but this did not change appreciably the water itent in their bodies, which remained at 66.3 % to 67.2 % during this period.

          This is very close to the water content of dry-fed animals (66.5 %), and the availability of free water, therefore, did not lead to any “storage” that could be meaningful as a water reserve. This makes it reasonable to conclude that physiological storage of water is not a factor in the kangaroo rat’s ability to live on dry food.

It is implied by the author that desert animals can exist with little or no water because of _________ .

A. less need for water than other animals

B. many opportunities for them to find water

C. their ability to eat plants

D. their ability to adjust to the desert environment