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Tham khảo:
Perilous pollutants may contain various types of impurities including harmful chemicals, dissolved gases, suspended matters, dissolved minerals, and even microbes. All the contaminants reduce the level of dissolved oxygen in the water and affecting the lives of animals and human beings to a great extent. Dissolved oxygen is the oxygen present in water required by the aquatic system to continue the lives of plants and animals. However biochemical oxygen is the demanded oxygen by the aerobic micro-organisms to oxidize organic matters of wastes. Water pollution is caused by two means, one is natural water pollution ( due to the leaching of rocks, decay of organic matters, decay of dead matters, silting, soil erosion, etc ) and another one is man-made water pollution ( due to the deforestation, set up of industries near large water bodies, high level emission of industrial wastes, domestic sewage, synthetic chemicals, radio-active wastes, fertilizers, insecticides, pesticides etc )
PART VII: (2.0 pts) Read the following passage and circle the answers A, B, C or D which is most accurate according to the information given in the passage.
In order to help solve the problem of pollution, people have to be aware of its causes, some of which are quite obvious in everyday life. In many cities people are forced to breathe in polluted air, commonly known as smog, which is a mixture of gases sent out by car exhausts and factory chimneys. What can be done to reduce air pollution is to remove factories from cities and use lead-free petrol in cars.
The pollution of rivers, lakes and seas leads to the death of the creatures that live in them. Factories are largely responsible for the present situation, which is expected to worsen if governments do not make them to obey the law against pollution and punish industries which pollute water.
Finally, all over the world, especially in cities, we see huge amounts of rubbish in the streets, which we are responsible for. The rubbish collection system often does not work properly and people themselves add to the problem by dropping litter in the streets. There is so much we could do to help solve the problem. The point is how willing are we to do something about it?
1. In order to help solve the problem of pollution,
A people need to know what causes it.
B people don’t need to know what causes it.
C people have to do something immediately.
D people don’t need to do anything about it.
2. Smog is caused by
A cars only
B factories only.
C cars and factories.
D air
3. The pollution of rivers, lakes and seas is largely caused by
A car exhausts.
B lead-free petrol in cars.
C factories.
D creatures.
4. Which of the following is NOT true?
A People add to the problem of pollution by collecting rubbish.
B People add to the problem of pollution by dropping litter.
C Huge amounts of rubbish in the cities cause pollution.
D We are responsible for huge amounts of rubbish in the cities.
5. The opposite of the word properly in the passage is
A unproperly B disproperly
C improperly D inproperly
I/read the passage and answer the following question:
Water pollution is the contamination of bodies of water such as lakes, rivers, oceans, and groundwater (the water beneath the Earth’s surface). It is one of the most serious types of pollution.
Water pollution can have many different causes. Factories dump industrial waste into lakes and rivers. Sewage from households is another cause. Farms using pesticides to kill insects and herbicides to kill weeds can also lead to water pollution. These factors cause ‘point source’ pollution while pollutants from storm water and the atmosphere result in ‘non-point source’ pollution.
Water pollution can have dramatic effects.
1.what are point source pollutants?
=> Factories dump industrial waste into lakes and rivers, sewage from households, farms using pesticides to kill insects and herbicides to kill weeds are point source pollutants.
2.what are the non-point source pollution
=> Pollutants from storm water and the atmosphere result are non-point source pollution.
II/choose the best answer A,B,C or D to complete the sentences:
1.I intended ......to New York next month
A.flew B. to fly C. fly D.flying
2.Earth.........by the gravity of the sun and orbits around it
A. is held B.hold C.to hold D.holding
III/ Circle the word with a different stress pattern from the other:
1. A.classic B.nature C.degree D.debris
2. A.dramatic B.tornado C.historic D.injury
3. A.communicative B.competitive C.opportunity D.unfortunate
4. A.authority B.impolite C.unhealthy D.repetitive
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