Deal only with work involving drug control

are excluded from the task force assigned to drug control

work with those who are assigned to the task of drug control

are assigned all law enforcement tasks excluding that of drug control

18. Astronomers have recently gained new knowledge of the behavior of galaxies. It has been discovered that spiral galaxies sometimes collide with each other. The huge forces created in such a cosmic event can tug long trails of stars and create new ones from compressed gases. After repeated collisions, galaxies may eventually merge, forming a single elliptical shape. Our galaxy, the Milky Way, is on a collision course with the nearby Andromeda Galaxy. Hundreds of millions of years from now, these tow star systems may combine to form one giant configuration.

In stating that “the Milky Way is on a collision course” the author means that

the Milky Way is going to crash into our own galaxy

The Milky Way is heading toward the Andromeda Galaxy

the Milky Way is the result of an impact that created one giant configuration

the Milky Way will crash into two star systems in hundreds of millions of

years

19. Christmas Island, discovered by Captain James Cook on Christmas Eve in

1777, was once populated by a wide variety of bird species. In recent years, at

least 18 species of birds – a total of 17 million birds – have been observed to

leave or to perish on the island. It is suspected that the cause of the disappearance may be related to a cyclical weather phenomenon in the Pacific that alerts winds, salinity, and ocean currents. These variously repeating conditions have resulted in higher water temperatures, which may have caused the fish and squid that the birds live on to die.

In stating that “the cause of the disappearance may be related to a cyclical

weather phenomenon” the author means that the cause is related to

hurricanes and cyclones

Recurring climatic conditions

a succession of environmental patterns

a combination of wind, salt, and ocean currents

20. The historic centers of the American sister cities Savannah, Georgia, and

Charleston, South Carolina, have fortunately been saved from demolition or

neglect and now attract tourists eager to view the gracious old houses. Of particular interest for the visitor is the exquisite decorative ironwork found

throughout the older parts of both cities, especially on porch and stair railings

and banisters.

In stating that “The historic centers of the American sister cities… have fortunately been saved from demolition” the author means that the city centers

have

+been kept intact

remained neglected

been elegantly restored

saved the tourist industry

21. Differences in the way men and women process language is of special interest to brain researches. It has been known that aphasia – a kind of a speech disorder– is more common in men than in women when left side of the brain is

damaged in an accident or after a stroke. However, women are more likely

than men to suffer aphasia when the front part of the brain is damaged. This

clearly indicates that the brains of men and women are organized differently

in the way they process speech.

The word “they” in the passage refers to

men

women

Brains

researches

22. Traditionally, America’s fast-food companies have hired teenagers. While

teenagers provide cheap labor, they are sometimes unreliable. Consequently,

fast-food companies often use another source of cheap labor – the elderly.

Older people are less likely to skip a day work or quit without giving a notice,

but because they have not been brought up with computers, they view the

high-tech fast-food counter with terror. Training centers have opened in order

to teach “mature workers” how to operate computerized cash registers. These

students are put into classrooms with their peers and, since mental arithmetic

is a thing of the past, are taught how to use a calculator.

The phrase “These students” in the passage refers to

teenagers

fast-food employers

The elderly

peers

23. Complete the sentence by choosing the phrase or clause that would most

likely to complete it Children dress up in witches’ hats or ghost costumes to play pranks when celebrating the fun October holiday of Halloween. In contrast,

Thanksgiving is a traditional holiday

Thanksgiving is always celebrated on the fourth Thursday of November