The nine-year-old raced back into the house and upstairs to his mother's room. He found it impossible to wake her up. Mrs. Kreamer, a victim of the smoke, was unconscious, and there was nobody to help Glenn carry her to the garden. But the boy remained calm and, as a fireman said later, "acted with all the self-control of a trained adult."

On the bedroom telephone, luckily still working, Glenn called his father and, leaving Mr. Kreamer to telephone the fire brigade and ambulance service, got on with the task of saving his mother.

First he filled a bucket with water from the bathroom and threw water over his mother and her bed. Then, with a wet cloth around his head he went back to the garden.

He could hear the fire engine coming up, but how would the firemen find his mother in the smoke-filled house where flames had almost swallowed up the ground floor?

Grasping firmly a ball of string from the garage, Glenn raced back into the house and dashed upstairs to his mother's room. Tying one end of the string to her hand he ran back, laying out the string as he went, through the hall and back out into the garden.

Minutes later he was telling fire chief John Coughlan :"The string will lead you to mother." Mrs. Kreamer was carried to safety as the flames were breaking through her bedroom floor.

71．Why did Glenn run downstairs first?

A．He wanted to find out what was happening. B．He was worried about his mother's safety.

C．He wanted to save his sister and brother.  D．He went to see if his father had come back.

72．Who called the fire brigade and ambulance service?

A．Glenn. B．Glenn's father.  C．Glenn's sister. D．Glenn's neighbor.

73．What did Glenn do to protect himself?

A．He put a wet cloth around his head.  B．He threw water all over himself.

C．He hid himself in the bathroom.     D．He rushed out to the lawn.

74．Glenn saved his family because __________.

A．his father had taught him to do so on the phone  B．he had learned something about first aid

C．he had dealt with the emergency calmly and wisely D．he had followed his mother's instruction

B

There are three separate sources of danger in supplying energy by nuclear power (原子能).

First, the radioactive material must travel from its place of production to the power station.

Although the power stations themselves are strongly built, the containers used for the transport of the materials are not. Normally, only two methods of transport are in use, namely road or rail, Unfortunately, both of these may have an effect on the general public, since they are sure to pass near, or even through, heavily populated areas.

Second, there is the problem of waste. All nuclear power stations produce wastes that in most cases will remain radioactive for thousands of years. It is impossible to make these wastes nonradioactive, and so they must be stored in one of the inconvenient ways that scientists have invented. For example, they may be buried under the ground, or dropped into deserted mines, or sunk in the sea. However, these methods do not solve the problem, since an earthquake could easily break the containers.