where extensive telephone and telegraph systems already exist, domestic satellites (or "domsats") are seen by the landline net work as an unfair competition. Despite such opposition, domsats are gaining support from many businesses and public interest groups in the United States, and seem likely to be more widely utilized in the future.

7. The passage mentions which of the following as a major advantage of domsats?

A. They are inexpensive to operate

B. They easily connect distant points

C. They can be directed by remote control.

D. They can be built to be very light.

8. According to the passage, the use of domsats is especially valuable for which of the following?

A. mountain areas B. busy cities C. small countries D. private businesses

9. Who objects to the use of domsats?

A. managers of international business group

B. people in small villages

C. operators of conventional communications systems

D. large public interest groups

10. According to the passage, future United States domsats will probably ________.

A. be produced competitively B. carry telephone message only

C. become a government monopoly (垄断) D. increase in use

A 17-year-old cave explorer was rescued(解救), wet and cold, today. He had been inside a narrow part of a cave for twenty-three hours without food or light.

Bill Dean had gone exploring by himself yesterday afternoon with only a lamp to light his way. Less than an hour after he entered the cave, his light went out. He sat in the damp(潮湿的) darkness the rest of the day, all night and part of today. "I was terrified," Bill said.

He had decided against trying o find his way out. He thought it best to wait for somebody to rescue him.

One boy crawled(爬行) 600 feet into the cave, but could not find Bill.

Finally, one of Bill's friends and a teacher crawled slowly inside, found him and led him to safety.

11. Yesterday afternoon Bill Dean_______

A. dropped into the cave

B. went into the cave by mistake

C. entered the cave to learn or to study something

D. was driven into the cave by somebody

12. Bill Dean had to stay in the cave because________.

A. he went into alone B. his light went out

C. he became afraid D. he had no food

13. After the light went out, Bill Dean________.

A. decided to wait for help B. tried to crawl out

C. crawled to find another way out D. lit a fire to light his way

14. Before he was rescued, Bill Dean_______.

A. had food left B. was walking about

C. cried for help D. was alone