IF THE MANAGER WERE HERE, HE WOULD SIGN YOUR PAPERIMMEDIATELYA....

Câu 37.

If the manager were here, he would sign your paper

immediately

A.

right ahead

B.

currently

C.

formally

D.

right away

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 38 to 45.

A rather surprisingly geographical feature of Antarctica is that a huge freshwater lake, one of

the world's largest and deepest, lies hidden there under four kilometers of ice. Now known

as Lake Vostok, this huge body of water is located under the ice block that comprises

Antarctica. The lake is able to exist in its unfrozen state beneath this block of ice because its

waters are warmed by geothermal heat from the earth's core. The thick glacier above Lake

Vostok actually insulates it from the

frigid

temperature (the lowest ever recorded on Earth)

on the surface.

The lake was first discovered in the 1970s while a research team was conducting an aerial

survey of the area. Radio waves from the survey equipment penetrated the ice and revealed a

body of water of indeterminate size. It was not until much more recently that data collected

by satellite made scientist aware of the tremendous size of the lake; satellite -borne radar

detected an extremely flat region where the ice remains level because it is floating on the

water of the lake.

The discovery of such a huge freshwater lake trapped under Antarctic is of interest to the

scientific community because of potential that the lake contains ancient

microbes

that have

survived for thousands upon thousands of years, unaffected by factors such as nuclear fallout

and elevated ultraviolet light that have affected organisms in more exposed areas. The

downside of the discovery, however, lies in the difficulty of conducting research on the lake

in such a harsh climate and in the problems associated with obtaining uncontaminated

samples from the lake without actually exposing the lake to contamination. Scientists are

looking for possible ways to accomplish this.