Đáp án : C
As + N/mệnh đề = như là … Dịch: như không khí đối với người, nước đối với cá cũng thế. Like + something = như thể là cái gì, mà thực tế không phải vậy
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29. Fill in the appropriate word in question 26
Environmental pollution
Environmental pollution is a term that refers to all the ways by which man pollutes his surroundings. Man dirties the air with gases and smoke, (25) _______the water with chemicals and other substances, and damages the soil with (26) _______ many fertilizers and pesticides. Man also pollutes his surroundings in various other ways. For example, people ruin natural beauty by (27) _______ junk and litter on the land and in the water. They operate machines and motor vehicles that fill the air with disturbing noise.
Environmental pollution is one of the most serious propblems facing humankind today. Air, water, and soil are necessary to the survival of all living things. Badly polluted air can cause illness, and (28) _______ death.Polluted water kills fish and other (29) _______ life. Pollution of soil reduces the amount of land that is available for growing food.
A. extreme
B. too
C. such
D. all
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29. Fill in the appropriate word in question 25
Environmental pollution
Environmental pollution is a term that refers to all the ways by which man pollutes his surroundings. Man dirties the air with gases and smoke, (25) _______the water with chemicals and other substances, and damages the soil with (26) _______ many fertilizers and pesticides. Man also pollutes his surroundings in various other ways. For example, people ruin natural beauty by (27) _______ junk and litter on the land and in the water. They operate machines and motor vehicles that fill the air with disturbing noise.
Environmental pollution is one of the most serious propblems facing humankind today. Air, water, and soil are necessary to the survival of all living things. Badly polluted air can cause illness, and (28) _______ death.Polluted water kills fish and other (29) _______ life. Pollution of soil reduces the amount of land that is available for growing food
A. disposing
B. filling
C. using
D. making
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29. Fill in the appropriate word in question 28
Environmental pollution
Environmental pollution is a term that refers to all the ways by which man pollutes his surroundings. Man dirties the air with gases and smoke, (25) _______the water with chemicals and other substances, and damages the soil with (26) _______ many fertilizers and pesticides. Man also pollutes his surroundings in various other ways. For example, people ruin natural beauty by (27) _______ junk and litter on the land and in the water. They operate machines and motor vehicles that fill the air with disturbing noise.
Environmental pollution is one of the most serious propblems facing humankind today. Air, water, and soil are necessary to the survival of all living things. Badly polluted air can cause illness, and (28) _______ death.Polluted water kills fish and other (29) _______ life. Pollution of soil reduces the amount of land that is available for growing food.
A. therefore
B. consequently
C. even
D. just
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29. Fill in the appropriate word in question 29
Environmental pollution
Environmental pollution is a term that refers to all the ways by which man pollutes his surroundings. Man dirties the air with gases and smoke, (25) _______the water with chemicals and other substances, and damages the soil with (26) _______ many fertilizers and pesticides. Man also pollutes his surroundings in various other ways. For example, people ruin natural beauty by (27) _______ junk and litter on the land and in the water. They operate machines and motor vehicles that fill the air with disturbing noise.
Environmental pollution is one of the most serious propblems facing humankind today. Air, water, and soil are necessary to the survival of all living things. Badly polluted air can cause illness, and (28) _______ death.Polluted water kills fish and other (29) _______ life. Pollution of soil reduces the amount of land that is available for growing food.
A. water
B. marine
C. hydro
D. coastal
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 25 to 29. Fill in the appropriate word in question 25
Environmental pollution
Environmental pollution is a term that refers to all the ways by which man pollutes his surroundings. Man dirties the air with gases and smoke, (25) _______the water with chemicals and other substances, and damages the soil with (26) _______ many fertilizers and pesticides. Man also pollutes his surroundings in various other ways. For example, people ruin natural beauty by (27) _______ junk and litter on the land and in the water. They operate machines and motor vehicles that fill the air with disturbing noise.
Environmental pollution is one of the most serious propblems facing humankind today. Air, water, and soil are necessary to the survival of all living things. Badly polluted air can cause illness, and (28) _______ death.Polluted water kills fish and other (29) _______ life. Pollution of soil reduces the amount of land that is available for growing food.
A. poisons
A. poisons
C. puts
D. surrounds
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.
As a result of pollution, Lake Erie, on the borders of the USA and Canada, is now without any living things. Pollutions in water are not simply a matter of “poisons” killing large numbers of fish overnight. Very often the effects of pollution are not noticed for many months or years because the first organisms to be affected are either plants or plankton. But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die in this way a whole food chain can be wiped out, and it is not until dead fish and water birds are seen at the river’s edge or on the sea shore that people realize what is happening. Where do the substances which pollute the water come from? There are two main sources – sewage and industrial waste. As more detergent is used in the home, so more of it is finally put into our rivers, lakes and seas.
Detergents harm water birds dissolving the natural substance which keep their feather waterproof. Sewage itself, if it is not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful since there are many high poisonous things in it, such as copper and lead. So, if we want to stop this pollution, the answer is simple, sewage and industrial waste must be made clean before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.
Pollution in water is noticed ______.
A. when the first organisms is affected
B. as soon as the balance of nature is destroyed.
C. when poisons are poured into water
D. when a good many fish and birds die
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.
As a result of pollution, Lake Erie, on the borders of the USA and Canada, is now without any living things. Pollutions in water are not simply a matter of “poisons” killing large numbers of fish overnight. Very often the effects of pollution are not noticed for many months or years because the first organisms to be affected are either plants or plankton. But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die in this way a whole food chain can be wiped out, and it is not until dead fish and water birds are seen at the river’s edge or on the sea shore that people realize what is happening. Where do the substances which pollute the water come from? There are two main sources – sewage and industrial waste. As more detergent is used in the home, so more of it is finally put into our rivers, lakes and seas.
Detergents harm water birds dissolving the natural substance which keep their feather waterproof. Sewage itself, if it is not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful since there are many high poisonous things in it, such as copper and lead. So, if we want to stop this pollution, the answer is simple, sewage and industrial waste must be made clean before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.
According to the passage, the way to stop water pollution is ______.
A. to make the waste material harmless.
B. to realize the serious situation clearly
C. to make special room in the sea for our rubbish
D. to put oxygen into the river
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 following questions from 31 to 35:
Centuries ago, man discovered that removing moisture from food helped to preserve it, and that the easiest way to do this was to expose the food to sun and wind. In this way the North American Indians produced pemmican (dried meat ground into powder and made into cakes), the Scandinavians made stock fish and the Arabs dried dates and apricots.
All foods contain water - cabbage and other leaf vegetables contain as much as 93% water, potatoes and other root vegetables 80%, lean meat 75% and fish anything from 80% to 60% depending on how fatty it is. If this water is removed, the activity of the bacteria which cause food to go bad is checked.
Fruit is sun-dried in Asia Minor, Greece, Spain and other Mediterranean countries, and also in California, South Africa and Australia. The methods used vary, but in general the fruit is spread out on trays in drying yards in the hot sun. In order to prevent darkening, pears, peaches and apricots are exposed to the fumes of burning sulphur before drying. Plums for making prunes, and certain varieties of grapes for making raisins and currants, are dipped in an alkaline solution in order to crack the skins of the fruit slightly and remove their wax coating, so increasing the rate of drying.
Nowadays most foods are dried mechanically; the conventional method of such dehydration is to put food in chambers through which hot air is blown at temperatures of about 110°C at entry to about 45°C at exit. This is the usual method for drying such things as vegetables, minced meat, and fish.
Liquids such as milk, coffee, tea, soups and eggs may be dried by pouring them over a heated horizontal steel cylinder or by spraying them into a chamber through which a current of hot air passes. In the first case, the dried material is scraped off the roller as a thin film which is then broken up into small, though still relatively coarse flakes. In the second process it falls to the bottom of the chamber as a fine powder. Where recognizable pieces of meat and vegetables are required, as in soup, the ingredients are dried separately and then mixed.
Dried foods take up less room and weigh less than the same food packed in cans or frozen, and they do not need to be stored in special conditions. For these reasons they are invaluable to climbers, explorers and soldiers in battle, who have little storage space. They are also popular with housewives because it takes so little time to cook them.
This passage is mainly ________.
A. informative
B. fictional
C. argumentative
D. anal ytical
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 following questions
The ability to conduct electricity is one of the key properties of a metal. Other solid material such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The lost electrons are free to move in what are known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this is what keeps the structure together.
An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they can be made to flow in one direction when a source of electrical energy such as a battery is connected to the metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good conductors of electricity. The only other common solid conducting material that pencil users are likely to encounter is graphite (what the ‘lead’ of a pencil is made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow. Freshwater Aquarium Fish
Playlist Freshwater Aquarium Fish
Electrical insulators are substances that cannot conduct electricity well either, because they contain no charged particles or any charged particles they might contain do not flow easily. Water itself is a poor conductor or electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral). However, most water we encounter does contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive.
By Helena Gillespie and Rob Gillespie. Science for Primary School Teacher. OUP
Water is a poor conductor because it contains
A. no positive or negative electric charge
B. only a small amount of fully charged particles
C. only a positive electric charge
D. only a negative electric charge
