Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The basic elements of public-opinion research are interviewers, questionnaires, tabulating equipment, and to sample population.

A. basic elements

B. are

C. tabulating

D. and to sample

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 28 to 34.

Biological diversity has become widely recognized as a critical conservation issue only in the past two decades. The rapid destruction of the tropical rain forests, which are the ecosystems with the highest known species diversity on Earth, has awakened people to the importance and fragility of biological diversity. The high rate of species extinctions in these environments is jolting, but it is important to recognize the significance of biological diversity in all ecosystems. As the human population continues to expand, it will negatively affect one after another of Earth's ecosystems. In terrestrial ecosystems and in fringe marine ecosystems (such as wetlands), the most common problem is habitat destruction. In most situations, the result is irreversible. Now humans are beginning to destroy marine ecosystems through other types of activities, such as disposal and runoff of poisonous waste; in less than two centuries, by significantly reducing the variety of species on Earth, they have irrevocably redirected the course of evolution.

Certainly, there have been periods in Earth's history when mass extinctions have occurred. The extinction of the dinosaurs was caused by some physical event, either climatic or cosmic. There have also been less dramatic extinctions, as when natural competition between species reached an extreme conclusion. Only 0.01 percent of the species that have lived on Earth have survived to the present, and it was largely chance that determined which species survived and which died out.

However, nothing has ever equaled the magnitude and speed with which the human species is altering the physical and chemical world and demolishing the environment. In fact, there is wide agreement that it is the rate of change humans are inflicting, even more than the changes selves, that will lead to biological devastation. Life on Earth has continually been in flux as slow physical and chemical changes have occurred on Earth, but life needs time to adapt-time for migration and genetic adaptation within existing species and time for the proliferation of new genetic material and new species that may be able to survive in new environments.
The author mentions the reduction of the variety of species on Earth in line 7-8 to suggest that ___________.

A. humans are often made ill by polluted water

B. new habitats can be created for species

C. some species have been made extinct by human activity

D. understanding evolution can prevent certain species from disappearing

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

The basketball team knew they lost the match. They soon started to blame each other.

A. Hardly had the basketball team known they lost the match when they started to blame each other

B. Not only did the basketball team lose the match but they blamed each other as wel

C. No sooner had the basketball team started to blame each other than they knew they lost the match

D. As soon as they blamed each other, the basketball team knew they lost the match

Mark the letter A, B, C or D on your answer sheet to indicate the word(s) OPPOSITE in the meaning to the underlined word(s) in ecah of the following questions.

She gave an impeccable reading of the sonata and had the audience on their feet.

A. suspicious

B. unqualified

C. negative

D. imperfect 

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Higher education is very importance to national economies and it is also a source of trained and educated personnel for the whole country

A. importance

B. economies

C. educated

D. the whole country

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

You can stay in the flat for free as long as you pay the bills.

A. Whether you pay the bills or stay in the flat, it is free

B. Without the bills paid, you can stay in the free flat

C. Unless the flat is free of bills, you cannot stay in it

D. Provided you pay the bills, you can stay in the flat for free

_________humans, toads have tongues fastened at the front of their mouths, which allow them to catch insects.

A. Unlike              

B. Except for                 

C. Dislike             

D. Not the same

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks.

The first question we might ask is: What can you learn in college that will help you in being an employee? The school teach a (46)________many things of value to the future accountant, doctor or electrician. Do they also teach anything of value to the future employee? Yes, they teach the one thing that it is perhaps most valuable for the future employee to know. But very few students bother (47)________it. This basic is the skill ability to organize and express ideas in writing and in speaking. This means that your success as an employee will depend on your ability to communicate with people and to (48)________your own thoughts and ideas to them so they will (49)________understand what you are driving at and be persuaded.

Of course, skill in expression is not enough (50)________itself. You must have something to say in the first place. The effectiveness of your job depends on your ability to make other people understand your work as they do on the quality of the work itself.

Điền vào số (50)

A. on

B. for    

C. by     

D. in

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks.

The first question we might ask is: What can you learn in college that will help you in being an employee? The school teach a (46)________many things of value to the future accountant, doctor or electrician. Do they also teach anything of value to the future employee? Yes, they teach the one thing that it is perhaps most valuable for the future employee to know. But very few students bother (47)________it. This basic is the skill ability to organize and express ideas in writing and in speaking. This means that your success as an employee will depend on your ability to communicate with people and to (48)________your own thoughts and ideas to them so they will (49)________understand what you are driving at and be persuaded.

Of course, skill in expression is not enough (50)________itself. You must have something to say in the first place. The effectiveness of your job depends on your ability to make other people understand your work as they do on the quality of the work itself.

Điền vào số (48)

A. interpret 

B. give out       

C. transfer        

D. present

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.

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 diseases. One egg yolk, in fact, contains a little more than two-thirds of the suggested daily cholesterol limit. This knowledge has driven 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 low 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-flat diets consisting of ingredients such as canola oil, flax, and rice bran. In spite of their diet, 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 result. It may be that it is not the type of eggs 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.

What has been the cause for changes in the sale of eggs?

A. increasing price

B. decreased production

C. dietary changes in hens

D. concerns about cholesterol