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.

The ocean bottom – a region nearly 2.5 times greater than the total land area of the Earth – is a vast frontier that even today is largely unexplored and uncharted. Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3,600 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth’s surface, the deep-ocean bottom is a hostile environment to humans, in some ways as forbidding and remote as the void of outer space. Although researchers have taken samples of deep-ocean rocks and sediments for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation’s Deep Sea Drilling Project (DSDP).Using techniques first developed for the offshore oil and gas industry, the DSDP’s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill in very deep waters, extracting samples of sediments and rock from the ocean floor.   

The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger’s core samples have allowed geologists to reconstruct what the planet looked like hundred of millions of years ago and to calculate what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger’s voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth.    

The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understanding the world’s past climates. Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change – information that may be used to predict future climates.

The author refers to the ocean bottom as a “frontier” in line 2 because it

Find the mistake and correct

John is having a clown birthday party. The clown is appearing. He always loves watching the clown. He is looking happy.

Lately, I ____ about changing my career because I ____ dissatisfied with the conditions at my company.

After the concert, everyone had to ____ through the thick snow.

They were walking on tiptoe _______ the Director's room.

Read the following passage and then choose the most suitable word or phrase for each space.

The money that some professional sportsmen earn shouldn't impress anyone when you take into (1) __ the fact that only a few of them manage to attain immortality and everlasting fame. And once they reach their (2) __ and display their talent at their best, they are fully conscious that their brilliant careers won't last forever. They live under a constant pressure of being (3) ____ and subsequently replaced by someone who is younger, faster and more accomplished. For that reason, objectives like retirement benefits and pensions are (4)____ great concern to all professional athletes. Some of the retired competitors go as far as to organize strikes and rallies to voice their protest against any policy unresponsive to their demand (5)_____ the younger professionals seek more upgrading solutions to the problem as more and more of them attach a proper significance to (6)___ a solid education, even at university level. Such an approach should help them find interesting and well-paid jobs (7)____ their sports career is over. A completely new strategy has been devised by the schools priding themselves (8)_____ supporting their own teams. Their authorities insist that the sports clubs members achieve high academic standards or else they are debarred from partaking in certain sports events, which may lead to further disruption in their professional careers. By these practical and most effective (9)___, combining education with sports activity, the (10)___ of the professional athlete as being brainless and unintelligent may eventually be changing to the sportsmen's benefit.

My car broke down yesterday, so I ____ catch a taxi to the office.

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.

Most human diets contain between 10 and 15 percent of their total calories as protein. The rest of the dietary energy comes from carbohydrates, fats, and in some people, alcohol. The proportion of calories from fats varies from 10 percent in poor communities to 40 percent or more in rich communities.

In addition to providing energy, fats have several other functions in the body. The fat-soluble vitamins, A, D, E, and K, are dissolved in fats, as their name implies. Good sources of these vitamins have high oil or fat content, and the vitamins are stored in the body’s fatty tissues. In the diet, fats cause food to remain longer in the stomach, thus increasing the feeling of fullness for some time after a meal is eaten. Fats add variety, taste, and texture to foods, which accounts for the popularity of fried foods. Fatty deposits in the body have an insulating and protective value. The curves of the human female body are due mostly to strategically located fat deposits.

Whether a certain amount of fat in the diet is essential to human health is not definitely known. When rats are fed a fat-free diet, their growth eventually ceases, their skin becomes inflamed and scaly, and their reproductive systems are damaged. Two fatty acids, linoleic and arachidonic acids, prevent these abnormalities and hence are called essential fatty acids. They also are required by a number of other animals, but their roles in human beings are debatable. Most nutritionists consider linoleic fatty acid an essential nutrient for humans.

This passage probably appeared in which of the following?

Could you close the window? There is a bit of a _____.

Indicate the word(s) OPPOSITE in meaning to the underlined word(s):

I prefer reading fictional stories to hearing about real events.

We were _______ by the officers' decision to divert the whole traffic from the main route.