Read the text. Then choose the correct answer to questions 30-32

D) made of a different material that arch dams

5. According to the passage, the water supplied from Hoover Dam is used for

A) strength and support
B) irrigation and electricity
C) protection and irrigation
D) electricity and support

6. According to the passage, the core of clay in the centre of an embankment dam serves which purpose?

A) To support the structure
B) To hold the side together
C) To form the shape of the dam
D) To prevent water seepage

The Railway was not the first institution to impose regularity on society, or to draw attention to the importance of precise timekeeping. For as long as merchants have set out their wares at daybreak and communal festivities have been celebrated, people have been in rough agreement with their neighbours as to the time of day. The value of this tradition is today more apparent than ever. Were it not for public acceptance of a single yardstick of time, social life would be unbearably chaotic: the massive daily transfers of goods, services, and information would proceed in fits and starts; the very fabric of modern society would begin to unravel.

7. The passage is written to

A) explain the importance of Railways for commuters.
B) explain the importance of Railways in social life.
C) explain the importance of Railways for commerce
D) explain the importance of Railways for travellers.

8. What is the main idea of the passage?

A) In modern society we must make more time for our neighbours.
B) The traditions of society are timeless.
C) An accepted way of measuring time .'is essential for the smooth functioning of society.
D) Society judges people by the times at which they conduct certain activities.

9. In the passage, how the tradition of punctuality in the society emphasized

A) by the practice of starting the business day at dawn
B) by friendly relations between neighbours
C) by the Railway's reliance on time schedules
D) by people's agreement on the measurement of time

The way emperor penguins care for and protect their unhatched eggs is one of the wonders of nature. The only land creatures able to survive the Antarctic winter, these birds must care for their young while withstanding 24-hour darkness, gale-strength winds, and temperatures of 85 to 95 degrees below zero. Each year, at the start of the Antarctic autumn, female emperor penguins each lay a single egg on bare ice. Then, after transferring care of the eggs to their mates, they take off across the open ice for the nearest fishing site. The males spend the next 65 days with neither food nor light, living off their considerable body fat and balancing the eggs on their feet under a protective flap of skin. During this time, they adapt to the brutal temperatures by huddling together in flocks of hundreds. Although penguins are unable to fly, they are superb swimmers. If all goes well, the females return from the sea with a meal of fish just as the eggs are hatching.

10. Which of the following best summarizes the main points of the passage?