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Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong. Compared with the tides, the waves created by the wind are surface movements feltno more than a hundred fathoms below the surface. The currents also seldom involve more than the upper several hundred fathoms despite their impressive sweep.
The tides are a response of the waters of the ocean to the pull of the Moon and the more distant Sun....
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Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong. Compared with the tides, the waves created by the wind are surface movements feltno more than a hundred fathoms below the surface. The currents also seldom involve more than the upper several hundred fathoms despite their impressive sweep.
The tides are a response of the waters of the ocean to the pull of the Moon and the more distant Sun. In theory, there is a gravitational attraction between the water and even the outermost star of the universe. In reality, however, the pull of remote stars is so slight as to be obliterated by the control of the Moon and, to a lesser extent, the Sun. Just as the Moon rises later each day by fifty minutes, on the average, so, in most places, the time of high tide iscorrespondingly later each day. And as the Moon waxes and wanes in its monthly cycle, so the height of the tide varies. The tidal movements are strongest when the Moon is a sliver in the sky, and when it is full. These are the highest flood tides and the lowest ebb tides of the lunar month and are called the spring tides. At these times, the Sun, Moon, and Earth are nearly in line and the pull of the two heavenly bodies is added together to bring the water high on the beaches, to send its surf upward against the sea cliffs, and to draw a high tide into the harbors. Twice each month, at the quarters of the Moon, when the Sun, Moon, and Earth lie at the apexes of a triangular configuration and the pull of the Sun and Moon are opposed, the moderate tidal movements called neap tides occur. Then the difference between high and low water is less than at any other time during the month.
Choose A, B, C, or D
1. The main point of the first paragraph is ...
A. The wave created by ocean currents are very large
B. Despite the strength of the wind, it only moves surface water
C. Deep ocean water is seldom affected by forces that move water
D. The tides are the most powerful force to affect the movement of ocean water
2. The word "In reality" in the third sentence of the second paragraph is closest in meaning to
A. Surprisingly
B. Actually
C. Characteristically
D. Similarly
3. According to the passage, the most vital factor in recognizing how much gravitational effect one object in space has on the tides is
A. Size
B. Distance
C. Temperature
D. Density
4. In the ninth sentence of the second paragraph, the word "configuration" is closest in meaning to
A. Unit
B. Center
C. Surface
D. Arrangement
5. Neap tides occur when
A. The sun counteracts the moon's gravitational attraction
B. The moon is full
C. The moon is farthest from the sun
D. Waves created by the wind combine with the moon's gravitational attraction
Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions.
Human memory, formerly believed to be rather inefficient, is really more sophisticated than that of a computer. Researchers approaching the problem from a variety of points of view have all concluded that there is a great deal more stored in our minds than has been generally supposed. Dr. Wilder Penfield, a Canadian neurosurgeon, proved that by stimulating their brains electrically, he could e...
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Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions.
Human memory, formerly believed to be rather inefficient, is really more sophisticated than that of a computer. Researchers approaching the problem from a variety of points of view have all concluded that there is a great deal more stored in our minds than has been generally supposed. Dr. Wilder Penfield, a Canadian neurosurgeon, proved that by stimulating their brains electrically, he could elicit the total recall of specific events in his subjects’ lives. Even dreams and other minor events supposedly forgotten for many years suddenly emerged in detail.
Although the physical basis for memory is not yet understood, one theory is that the fantastic capacity for storage in the brain is the result of an almost unlimited combination of interconnections between brain cells, stimulated by patterns of activity. Repeated references to the same information support recall. Or, to say that another way, improved performance is the result of strengthening the chemical bonds in the memory.
1. With what topic is the passage mainly concerned?
A. Wilder Penfield B. Neurosurgery
C. Human memory D. Chemical reactions
2. According to the passage, researchers have concluded that
A. the mind has a much greater capacity for memory than was previously believed.
B. the physical basis for memory is clear.
C. different points of view are valuable.
D. human memory is inefficient.
3. How did Penfield elicit dreams and other minor events from the past?
A. By surgery B. By electric stimulation C. By repetition D. By chemical stimulation
4. According to the passage, the capacity for storage in the brain
A. can be understood by examining the physiology.
B. is stimulated by patterns of activity.
C. has a limited combination of relationships.
D. is not influenced by repetition.
5. The word “bonds” in the last line means
A. promises. B. agreements. C. connections. D. responsibilities
Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions.
Rain forests cover less than six percent of the earth’s area, but they have 100,000 kinds of all the kinds of plants on the earth. Three-fourths of known kinds of plants and animals call the rain forest their home. Twenty percent of our different kinds of medicine come from rain forests. The glues on an envelope and in shoes come from tropical plants. Rain forests provide materials for hundred...
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\(Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions. Rain forests cover less than six percent of the earth’s area, but they have 100,000 kinds of all the kinds of plants on the earth. Three-fourths of known kinds of plants and animals call the rain forest their home. Twenty percent of our different kinds of medicine come from rain forests. The glues on an envelope and in shoes come from tropical plants. Rain forests provide materials for hundreds of other products. Rain forests are also very important to the world’s climate. The Amazon rain forest alone receives about thirty to forty percent of the total rainfall on the earth and products about the same percentage of the world oxygen. Some scientists believe that the decreasing size of rain forests will affect the climate on the earth, making it uncomfortable or even dangerous for life. Saving rain forests is an international problem. One country, or even a few countries, cannot solve the problem alone. The nations of the world must work together to find a solution before it is too late. 1. What percent of the earth’s area do rain forests cover? A. Only 6 percent B. 20 percent C. less than 6 percent D. over 6 percent 2. How many known kinds of plants and animals call the rain forests their home? A. B. C. D. 3. What percent of the total rainfall on the earth does the Amazon rain forests receive? A. about 20 to 30 B. less than 30 C. exactly 30 to 40 D. about 30 to 40 4. According to some scientists, what will the decreasing size of rain forests affect on the earth? A. oxygen B. climate C. plants D. only animals 5. According to the passage, what must the nations of the world do to find a solution? A. work together B. work alone C. save rain forests only D. save their lives \)
Mercury is the smallest member of the suns family. It is only 3.100 miles across. It is also the suns swiftest planet. Its yearly journey round the sun is only 85 days.
Mercury always keeps one side towards the sun. On this side it is always day, on the other side always night. We only see the lighted side.
Mercury appears to us like a yellowish orange star. The nearest planet to the sun, it is always seen near the sun, either just before sunrise or soon after sunset. P...
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Mercury is the smallest member of the sun's family. It is only 3.100 miles across. It is also the sun's swiftest planet. Its yearly journey round the sun is only 85 days.
Mercury always keeps one side towards the sun. On this side it is always day, on the other side always night. We only see the lighted side.
Mercury appears to us like a yellowish orange star. The nearest planet to the sun, it is always seen near the sun, either just before sunrise or soon after sunset. People sometimes call mercury the morning star or evening star.
Mercury is half the size of the earth. Because it is much lighter, it has much less gravity. If you can visit Mercury in a spaceship, you will find it a strange world. Its low gravity makes you feel very light. If your weight on earth is 100 pounds, your weight on Mercury is only 27 pounds. Looking at the sun from Mercury, you can see that it's much more brilliant than it is seen from the earth. And the yellow centre of the sun appears three times bigger from Mercury.
On its lighted side, Mercury's temperature is about 300 degrees centigrate. But the dark side is extremely cold, but 150 degrees below zero so mercury is probably the coldest as well as the hottest of the planets.
21. A. Mercury is .......
A. the sun's fastest planet B. the coldest planet
C. the hottest planet D. all are correct
22. We cannot see the dark side of Mercury because .......
A. it moves very fast.
B. it always appears just before sunrise or soon after sunset.
C. it always keeps one side towards the sun.
D. it is too far for us to see.
23. When can we see Mercury? - We can see it ......
A. just before the sunset
B. just before sunrise
C. after the sunset
D. both A and C are correct
24. Why do we weigh much on the earth than on Mercury? - Because .......
A. Mercury is nearer to the sun. B. Mercury has got less gravity than the earth.
C. Mercury is much hotter. D. none are correct.
25. Why does the sun look bigger when it is seen from Mercury?
- Because .......
A. Mercury is the smallest planet of the sun.
B. Mercury is nearer to the sun.
C. Mercury is a light planet.
D. It only takes Mercury 88 days to move round the sun.
Chọn đáp án và giải thích chi tiết
Read the following passage and mark the letter A , B , C or D to indicate the correct word or phrase that best fits each the numbered blanks.
Culture has a strong influence on non-verbal communication . Even the simple act of looking someone in the eye is not at all that simple . In the USA , Americans are (1)............ to look directly at people when speaking to them . It shows interest in what they are saying and is thought to carry a (2)................ of honesty . Meanwhile , in Japan...
Đọc tiếp
Read the following passage and mark the letter A , B , C or D to indicate the correct word or phrase that best fits each the numbered blanks.
Culture has a strong influence on non-verbal communication . Even the simple act of looking someone in the eye is not at all that simple . In the USA , Americans are (1)............ to look directly at people when speaking to them . It shows interest in what they are saying and is thought to carry a (2)................ of honesty . Meanwhile , in Japan and Korea , people avoid long periods of eye contact . It is considered more polite to look to the side during a conversation . The Lebanese , (3) ............. , stand close together and look intensely into each other's eyes . The action shows sincerity and gives people a better sense of what their counterparts want . Given such differences with even the most common expressions , people (4) .............. travel or work abroad have a real need to learn the other culture's body language . People tend to be unaware of the messages they are sending to others . So , it is useful to consider your own body language before dealing (5).............. people from other cultures . Knowing about the body language of friends , clients , and colleagues can be very helpful in improving understanding and avoiding miscommunication .
1. A. encouraged B. assisted C. forbidden D. opposed
2. A. sense B. taste C. sound D. touch
3. A. therefore B. in addition C. in contrast D. moreover
4. A. who B. where C. which D. whose
5. A. of B. with C. from D. over
III. Chose the word to fill in the gaps among A,B, C or D:
Two of the most important holidays in the United state are Independence day and Thanksgiving Day. The fourth of July marks the American declaration of independence from Britain. Most towns, big or small, celebrate the fourth of July with parades and fireworks. Families(1)....................with barbecues or picnics. Thanksgiving Day is celebrated in Fall, on the fourth Thursday in November. It is a day (2)......
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III. Chose the word to fill in the gaps among A,B, C or D:
Two of the most important holidays in the United state are Independence day and Thanksgiving Day. The fourth of July marks the American declaration of independence from Britain. Most towns, big or small, celebrate the fourth of July with parades and fireworks. Families(1)....................with barbecues or picnics. Thanksgiving Day is celebrated in Fall, on the fourth Thursday in November. It is a day (2)...........people give thanks to the harvest. Most families (3)...........a large dinner with roast turkey. (4).....................Independence Day and Thanksgiving are national (5)...........................
1. A. celebrating B. celebration C. celebrate D. celebrated
2. A. where B. when C. which D. in which
3. A. have B. buy C. help D. take
4. A. Besides B. Both C. Either D. Nor
5. A.chances B. months C. holidays D. times
II/ Read the text and choose the best answers A, B, C or D. to the questions. (1m)
Most of the countries in the world have searched for alternative sources of energy in various directions. Many communities are burning garbage and other biological waste products to produce electricity. Converting waste products to gases or oil is also an efficient way to dispose of waste.
Experimental work is being done to derive synthetic fuels from coal, oil, shale and coal tars. But today that proc...
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II/ Read the text and choose the best answers A, B, C or D. to the questions. (1m)
Most of the countries in the world have searched for alternative sources of energy in various directions. Many communities are burning garbage and other biological waste products to produce electricity. Converting waste products to gases or oil is also an efficient way to dispose of waste.
Experimental work is being done to derive synthetic fuels from coal, oil, shale and coal tars. But today that process has proven expensive. Other experiments are underway to harness power with giant windmills. Geothermal power heat from the earth is also being tested.
Some experts expect utility companies to revive hydroelectric power derived from streams and rivers. Fifty years ago hydroelectric power provided one third of the electricity used in the United States, but today it supplies only five percent. The oceans are another potential source of energy. Scientists are studying ways to convert the energy of ocean currents, tides, and waves to electricity. Experiments are also underway to make use of the temperature differences in ocean water to produce energy.
1. Which is the best title of the passage?
A. The use of water productions for energy
B. Efficient ways of disposing of waste
C. The search for Alternative Sources of Energy
D. New Discoveries in Geothermal Power
2. Fifty years ago one third of the electricity in the United States was provided by_________.
A. wind B. waste products C. oil D. water
3. In the second paragraph, the phrase “synthetic fuels” could be best replaced by which of the following _________.
A. biological fuels B. artificial made fuels
C. low burning fuels D. fast burning fuels
4. Which of the following is NOT mentioned in the passage as an alternative source of energy?
A. electricity B. burning of garbage
C. geothermal power D. synthetics fuels
5. According to the author, the impracticability of using coal, oil shale and coal tars as sources of energy is due to _________.
A. their being money consuming B. their being time consuming
C. the scarcity of sources D. the lack of technology
1: Ten miles ………. a very long distance for us to walk.
A. is B. are C. be D. am
2: There are small……………………….between British and American English.
A. differences B. difference C. differently D. different
3: The quality of these recordings .................. not very good.
A. be B. are C. am D. is
4: The number of student...
Đọc tiếp
1: Ten miles ………. a very long distance for us to walk.
A. is B. are C. be D. am
2: There are small……………………….between British and American English.
A. differences B. difference C. differently D. different
3: The quality of these recordings .................. not very good.
A. be B. are C. am D. is
4: The number of students in this class …………. limited to thirty.
A. be B. are C. is D. am
5: Not only the air but also the oceans ..................... been polluted seriously.
A. have B. has C. is having D. are having
6: Working in the factory ................... not what children should do
A. be B. is C. are D. have been
7: A large number of students in this school………. . English quite fluently
A. speaks B. is speaking C. has spoken D. speak
8: Bread and butter ………..... what she asks for
A. is B. are C. will be D. have been
9: Neither Daisy nor I …........... glad to do that.
A. am B. has been C. are D. is
10: Some of the milk I bought last night ..................... not fresh anymore.
A. is B. is being C. are D. are
11: The use of credit cards in place of cash ................ increased rapidly in recent years.
A. to have B. have C. has D. having
12: The police ……….. to interview Fred about a robbery.
A. want B. wants C. wanting D. has wanted
13: That you take a computer course …............... very necessary.
A. am B. have been C. are D. is
14: Each of the residents in this community ........... responsible for keeping this park clean.
A. is B. am C. are D. were
15: Anything ........................ better than going to the movies tonight.
A. is B. are C. am D. were
16: What time ......................... the news on TV?
A. is B. am C. are D. were
17: The effects of cigarette smoking ................... been proven to extremely harmful.
A. have B. has C. to have D. having
18: Advertisements on TV .......................becoming more competitive than ever before.
A. is B. are C. was D. was
19: Mr. Thomson with his wife and his three children ............… abroad
A. to be B. have been C. are D. is
20: A pair of jeans .................... in the washing machine this morning.
A. is B. are C. have been D. were
Exercise 13
Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions.
There are many varieties of spider in the American Southwest, but none receives more respect than the western black widow, Latrodectus Hesperus. This poisonous spider, also called the “hour-glass” or “shoe-button” spider for the shape of the red markings on its abdomen, produces a venom 15 times more powerful than that of a rattlesnake. However, few deaths can be blamed on this...
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Exercise 13
Read the following passage and choose the most appropriate answer from A,B,C or D to answer questions.
There are many varieties of spider in the American Southwest, but none receives more respect than the western black widow, Latrodectus Hesperus. This poisonous spider, also called the “hour-glass” or “shoe-button” spider for the shape of the red markings on its abdomen, produces a venom 15 times more powerful than that of a rattlesnake. However, few deaths can be blamed on this insect because bites are rare and only a small amount of poison enters the body.
The female adult black widow may reach a length of 1 ¼ inches, while the smaller male averages ¼ inch long. The adult female has a shiny black bulb-shaped abdomen, which distinguishes it from the male of the species. The male is generally brown with red and white markings on its flat underside.
The female adult deposits its eggs in specially constructed sacs that hold from 50 to 250 eggs. The tiny pale spiderlings hatch within a few months and gradually develop into adults in one to two years. Some females live up to three years. The male does not fare so well, as it sometimes suffers the fate of being consumed by the female after the summer mating season.
1. What does the passage mainly discuss?
A. Varieties of spider in the southwestern U.S.
B. Characteristics of Latrodectus Hesperus
C. Poisonous animals of the American Southwest
D. the abdomens of black widow spiders
2. It can be inferred from the passage that rattlesnakes
A. cause more deaths than black widows
B. do not have markings on their bodies
C. are limited in geographical range
D. have more powerful venom than black widows
3. Which of the following is NOT mentioned in the passage as a difference between a male and female black widow?
A. Its body length B. The shape of its body
C. The potency of its venom D. Its life span
4. In line 7, the word “underside” refers to
A. the portion of the head closest to the ground
B. the legs C. the upper back D. the abdomen
5. According to the passage, the maturation of baby black widow spiders occurs
A. very rapidly B. over a couple of years
C. within several months D. during the summer mating season