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

Some workers were inhibited from speaking by the presence of their managers.

A. deferred 

B. discharged       

C. triggered 

D. prevented

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

Owning a pet

The joys and tribulations of being a pet owner! During our lifetime most of us have some experience of either owning a pet or being in (35)___________contact with someone who does. Is there such a things as “the ideal pet”? If so what characterizes the ideal pet? Various (36)___________influence one’s choice of pet, from your reasons for getting a pet to your lifestyle. For example, although quite a few pets are relatively cheap to buy, the cost of (37)___________can be considerable. Everything must be (38)___________into account, from food and bedding, to vaccinations and veterinary bills. You must be prepared to (39)___________time on your pet, which involves shopping for it, cleaning and feeling it. Pets can be demanding and a big responsibility.   Are you prepared to exercise and      (40)___________an animal or do you prefer a more independent pet?     How much spare      room do you have? Is it right to lock an energetic animal into a (41)___________space? Do you live near a busy road which may threaten the life of your pet? Pets (42)___________as turtles and goldflsh can be cheap and convenient, but if you prefer affectionate pets, a friendly cat or dog would be more (43)___________. People get pets for a number of reasons, for company, security or to teach responsibility to children. Pets can be affectionate and loyal and an excellent source of company as long as you know what pet (44)___________you and your lifestyle.

Điền vào số 35

A. near

B.close

C.narrow

D. tight

a) \(\dfrac{x^2-5}{x+\sqrt{5}}\)(với x khác -\(\sqrt{5}\)) =\(\dfrac{\left(x-\sqrt{5}\right)\left(x+\sqrt{5}\right)}{x+\sqrt{5}}\) = x-\(\sqrt{5}\) vậy \(\dfrac{x^2-5}{x+\sqrt{5}}\) = x-\(\sqrt{5}\) với x khác -\(\sqrt{5}\) b) \(\dfrac{x^2+2\sqrt{2}x+2}{x^2-2}\) ( với x khác +-\(\sqrt{2}\) ) = \(\dfrac{\left(x+\sqrt{2}\right)^2}{\left(x+\sqrt{2}\right)\left(x-\sqrt{2}\right)}\) =\(\dfrac{x+\sqrt{2}}{x-\sqrt{2}}\) vậy \(\dfrac{x^2+2\sqrt{2}x+2}{x^2-2}\) =\(\dfrac{x+\sqrt{2}}{x-\sqrt{2}}\) với x khác +-\(\sqrt{2}\)

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 55 to 64

An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in such quantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexible definition that permits continuous change. When the first air pollution laws were established in England in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled - a far cry from the extensive list of harmful substances known today. As technology has developed and knowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapor might be considered an air pollutant under certain conditions.

Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides, are found in nature. As the Earth developed, the concentration of these pollutants was altered by various chemical reactions; they became components in biogeochemical cycles. These serve as an air purification scheme by allowing the compounds to move from the air to the water or soil. On a global basis, nature's output of these compounds dwarfs that resulting from human activities.

However, human production usually occurs in a localized area, such as a city. In such a region, human output may be dominant and may temporarily overload the natural purification scheme of the cycles. The result is an increased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear will be greater than the concentrations that the pollutants would have in the absence of human activities. The actual concentration need not be large for a substance to be a pollutant; in fact, the numerical value tells us little until we know how much of an increase this represents over the concentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times its natural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm

The word "These" in the second paragraph is closest in meaning to________.

A. the components in biogeochemical cycles 

B. the pollutants from the developing Earth

C. the various chemical reactions 

D. the compounds moved to the water

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer in each of the following question.
People have used coal and oil to______electricity for a long time.

A. bred

B. raise

C. cultivate

D. generate