Reading comprehension -TOEFL- Lesson 15 (Đọc hiểu -TOEFL- Bài 15)

 bloodstream when children ingest flakes of chipped paint,plaster,or paint dust from sanding. Lead can also enter the body through household dust, nailbiting, thumb sucking, or chewing on toys and other objects painted with lead-based paint. Although American paint companies today must comply with strict regulations regarding the amount of lead used in their paint, this source of lead poisoning is still the most common and most dangerous. Children living in older, dilapidated houses are particularly at risk.
1. What is the main topic of the passage?
(A) problems with household paint
(B) major health concerns for children
(C) lead poisoning in children
(D) lead paint in older homes
2. Which part of the passage discusses symptoms and consequences of lead poisoning?
(A) lines 1-6
(B) lines 8-13
(C) lines 13-16
(D) lines 16-17
3. The phrase "exposed to" in line 2 could best be replaced by which of the following?
(A) familiar with
(B) in contact with
(C) displaying
(D) conducting
4. As used in line 3, which of the following is closest in meaning to the word "suffer"?
(A) experience
(B) reveal
(C) feel pain from
(D) grieve with
5. Which of the following does the passage infer?
(A) Paint companies can no longer use lead in their paint.
(B) Paint companies aren't required to limit the amount of lead used in their paint.
(C) Paint companies must limit the amount of lead used in their lead.
(D) Paint companies have always followed restrictions regarding the amount of lead used in their paint.
6. Which of the following is closest in meaning to the phrase "linked to" in line 8?
(A) endorsed by
(B) threatened by
(C) combined with
(D) associated with
7. The word "absorbed" in line 9 could best bereplaced by
(A) fixed
(B) assimilated
(C) soaked
(D) accepted
8. In line 9, the word "ingest" could best be replaced by which of the following?
(A) inhale
(B) digest
(C) inject
(D) eat
9. Which of the following is closest in meaning to the word "chipped" as used in line 10?
(A) fragmented
(B) canned
(C) sprayed
(D) unhealthy
10. In line 16, the word "dilapidated" is closest in meaning to which of the following?
(A) poorly painted
(B) unpainted
(C) falled down
(D) broken down
11. According to the passage, what is the most common source of lead poisoning in children?
(A) household dust
(B) lead-based paint
(C) painted toys
(D) dilapidated houses
12. What does the author imply in the final sentence of the passage?
(A) Lead-based paint chips off more easily than newer paints.
(B) Poor people did not comply with the regulations.
(C) Old homes were painted with lead-based paint.
(D) Old homes need to be rebuilt in order to be safe for children.
Reading comprehension -TOEFL- Lesson 24 (Đọc hiểu -TOEFL- Bài 24)
Đọc đoạn văn sau và trả lời các câu hỏi:
Although they are an inexpensive supplier of vitamins, minerals, and high-quality protein, eggs also contain a high level of blood cholesterol, one of the major causes of heart disease. One egg yolk, in fact, contains a little more than two-thirds of the suggested daily cholesterol limit. This knowledge has caused egg sales to plummet in recent years, which in turn has brought about the development of several alternatives to eating regular eggs. One alternative is to eat substitute eggs. These egg substitutes are not really eggs, but they look somewhat like eggs when they are cooked. They have the advantage of having lower cholesterol rates, and they can be scrambled or used in baking. One disadvantage, however, is that they are not good for frying, poaching, or boiling. A second alternative to regular eggs is a new type of egg, sometimes called "designer" eggs. These eggs are produced by hens that are fed low-fat diets consisting of ingredients such as canola oil, flax, and rice bran. In spite of their diets, however, these hens produce eggs that contain the same amount of cholesterol as regular eggs. Yet, the producers of these eggs claim that eating their eggs will not raise the blood cholesterol in humans.
Egg producers claim that their product has been portrayed unfairly. They cite scientific studies to back up their claim. And, in fact, studies on the relationship between eggs and human cholesterol levels have brought mixed results. It may be that it is not the type of egg that is the main determinant of cholesterol but the person who is eating the eggs. Some people may be more sensitive to cholesterol derived from food than other people. In fact, there is evidence that certain dietary fats stimulate the body's production of blood cholesterol. Consequently, while it still makes sense to limit one's intake of eggs, even designer eggs, it seems that doing this without regulating dietary fat will probably not help reduce the blood cholesterol level.
1. What is the main purpose of this passage?
(A) to inform people about the relationship between eggs and cholesterol
(B) to convince people to eat "designer" eggs and egg substitutes
(C) to persuade people that eggs are unhealthy and should not be eaten
(D) to introduce the idea that dietary fat increases the blood cholesterol level
2. As used in line 5, the word "plummet" refers to which of the following?
(A) drop abruptly
(B) rise gently
(C) hesitate unexpectantly
(D) bounce uncertainly
3. According to the passage, which of the following is a cause of heart disease?
(A) minerals
(B) cholesterol
(C) vitamins
(D) canola oil
4. As used in line 9, which of the following could best replace the word "somewhat"?
(A) indefinitely
(B) in fact
(C) a little
(D) a lot
5. According to the passage, what has been the cause for changes in the sale of eggs?
(A) dietary changes in hens
(B) decreased production
(C) increasing price
(D) a shrinking market
6. According to the passage, one egg yolk contains approximately what fraction of the suggested daily limit for human consumption of cholesterol?
(A) 1/3
(B) 1/2
(C) 2/3
(D) 3/4
7. As used in line 19, the word "claim" means
(A) guarantee
(B) assert
(C) deny
(D) confirm
8. The word "portrayed" in line 19 could best be replaced by which of the following?
(A) described
(B) studied
(C) destroyed
(D) tested
9. As used in line 20, what is the meaning of thephrase "back up"?
(A) reverse
(B) advance
(C) support
(D) block
10. What does the author mean by the phrase "mixed results" in line 22?
(A) The results are blended.
(B) The results are inconclusive.
(C) The results are a composite of things.
(D) The results are mingled together.
11. According to the passage, egg substitutes cannot be used to make any of the following types of eggs EXCEPT
(A) scrambled
(B) fried
(C) poached
(D) boiled
12. According to the author, which of the following may reduce blood cholesterol?
(A) reducing egg intake but not fat intake
(B) increasing egg intake and fat intake
(C) increasing egg intake but not fat intake
(D) decreasing egg intake and fat intake
Reading comprehension -TOEFL- Lesson 25 (Đọc hiểu -TOEFL- Bài 25)
Đọc đoạn văn sau và trả lời các câu hỏi:
A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance.
1. With which topic is this passage mainly concerned?
(A) Some scientists have challenged a theory.
(B) Some small teeth have been discovered.
(C) Some mammoths lived longer than others.
(D) Some pachyderms survived on an island.
2. According to the passage, some researchers suggest that mammoths became extinct
(A) about 2,000 years ago
(B) about 4,000 years ago
(C) about 7,000 years ago
(D) about 10,000 years ago
3. The word "woolly" as used in line 2 refers to the animal's
(A) body size
(B) feet size
(C) hair
(D) teeth
4. The word "uncovered" as used in line 5 is closest in meaning to which of the following?
(A) unearthed
(B) unburdened
(C) undisturbed
(D) unfolded
5. The word "adapted" in line 8 could best be replaced with
(A) lept
(B) penetrated
(C) revealed
(D) accommodated
6. In line 8, the word "confined" could best be replaced by
(A) imprisoned
(B) swampy
(C) restricted
(D) fenced
7. The author uses the word "counterpart" in line 12 to refer to
(A) mammoths with more feet
(B) mammoths in an earlier time
(C) mammoths with smaller teeth
(D) larger mammoths on the island
8. The word "enable" in line 12 could best be replaced by which of the following?
(A) authorize
(B) enjoin
(C) undertake
(D) allow
9. The word "belated" in line 15 is closest in meaning to which of the following?
(A) delayed
(B) early
(C) sudden
(D) gradual
10. According to the scientists, the woolly mammoths may have managed to survive because they
(A) shed their hair
(B) grew smaller teeth
(C) became herbivores
(D) decreased in size
11. According to the passage, the reason for the disappearance of the mammoths on the island is
(A) that the temperature changed
(B) is not yet known
(C) that they were isolated
(D) that larger mammoths killed them
12. Which of the following terms from the passage is NOT used to refer to the mammoths?
(A) beasts
(B) pachyderms
(C) bulk
(D) group
 At the end!