A sleep researcher says:“No one should worry about not sleeping unless they are not feeling well or cannot do their work properly. Lack of sleep doesn't matter greatly if we are resting—the body can still get on with its repain work. But worrying about not sleeping can sometimes do you harm. There would be far less sleeplessness about if we planned our sleeping lives as carefully as we plan our waking ones.”
　　1. According to the passage, people have difficulty getting to sleep because.
　　A. they work more than sixty hours a week
　　B. they have too many enemies
　　C. they do not sleep happily
　　D. they are not tired enough
　　2. In comparison with Voltaire, Sir Winston Churchill.
　　A. was happier with three hours of sleep
　　B. would sleep more when stretched out
　　C. world enjoy a longer sleep if possible
　　D. was less happy when he was asleep
　　3. Studies show that the average woman.
　　A. sleeps less than the average man
　　B. sleeps longer when she goes out to work
　　C. has difficulty in getting to sleep
　　D. sleeps over eight hours a night
　　4. Dr. Harmann is mentioned in the passage.
　　A. as the opponent of Dr. Ian Oswald
　　B. because he has strange sleeping habits
　　C. as the pioneering sleep scientist
　　D. because of his observation and analysis of sleep habits
　　5. Not being able to sleep can be dangerous if we.
　　A. are feeling well
　　B. worry about it too much
　　C. repair our bodies by resting
　　D. plan our sleeping lives carefully

Questions 6～10
　　I think it was De Mandeville who suggested a river party for the staffs of the various embassies. Nor, on the face of it, was the idea a bad one. All winter long the logs come down the River Sava until the frost locks them in: now with the spring thaw the river has a pontoon of treetrunks some forty feet wide lining the bank under the willows so that you can walk out over the river, avoiding the margins, and swim in the deep water.
　　These logs had been made into a hundred feet by sixty—big enough even to dance on. While everyone was dancing the rumba and while the buffet was plying a heavy trade, it was noticed that the distance between the raft and the shore had noticeably increased. The gang-plank subsided in the ooze. It was not a great distance—perhaps ten feet. But owing to the solid resistance such a large raft set up in the main current the pull was definitely outward. But as yet nobody was alarmed; indeed most of the party thought it was part of a planned entertainment.
　　As we approached the next bend of the river it looked as if the whole thing would run aground on the bank, and a few of us made preparations to grab hold of the overhanging willows and halt our progress. But by ill luck a change in the current carried us just too far into the centre of the river and we were carried past the spit of land, vainly groping at the tips of bushes.
　　It was about another five minutes before the full significance of our position began to dawn upon us. By this time we were moving in stately fashion down the centre of the river, all lit up like a Christmas tree. Exclamations, suggestions, counter suggestions poured from the lips of the diplomates and their spouses in a dozen tongues.
　　Unknown to us, too, other factors were being introduced which were to make this a memorable night for us all. Spy-mania was at its height and the Yugoslav forces lived in a permanent state of alertness. There were frequent rumours of armed raids from Czechoslovakia.It was in this context that some Yugoslav infantryman at an observation post along the river saw what he took to be a large armed man on war full of Czech paratroops in dinner jackets and ball dresses sailing upon Belgrade. He did not wait to verify this first impression. He galloped into Belgrade Castle a quarter of an hour later on a foam-flecked mule with the news that the city was about to be invaded.
　　6. According to the passage, a river party was practicable because__________.
　　A. the river was lined with willow trees
　　B. the banks were not muddy at this time
　　C. there was a suitable surface for walking on
　　D. there was not too much frost at this season
　　7. The raft started moving from the shore because___________.
　　A. the gang-plank had fallen in the mud
　　B. the buffet was too heavy
　　C. it was too large to stay in place
　　D. the organisers wanted to surprise the guests
　　8. The raft did not stop at the next bend because_______________.
　　A. there was too much mud on the river bank
　　B. There were only bushes to catch hold of
　　C. the current made it swirl outwards
　　D. the water was not shallow enough
　　9. According to the passage, people on the raft were____________.
　　A. completely unaware of their situation
　　B. quarrelling angrily
　　C. indignant with the organizers of the party
　　D. anxious to help solve the problem
　　10. The Yugoslav look out made a mistake because______________.
　　 A. the party were dressed in soldiers' uniforms
　　 B. the raft was sailing towards Belgrade
　　 C. many of the party were armed
　　 D. he was affected by the general tension
　　Questions 11～15
　　The elephants left the shade, crossed an open piece of grass between bushes, and came towards the mud-pool where my truck was parked. One by one they arrived on the shore, but, just as they seemed to be about to bathe in the inviting muddy liquid, they became aware of the silent truck with its tell-tale smell of man. the leading elephant merely spread her ears and cautiously backed away taking the young elephants with her.
　　A smaller mother elephant continued to stand next to the pool, however, swinging her long trunk and swaying her head from side to side, always keeping an eye on the truck. The baby elephant behind her held up his head, waving his trunk to sample the suspicious smell in the wind. The mother elephant seemed to be uncertain about whether to come on and investigate the truck or to back away with the other. Finally she made up her mind and slowly advanced on the truck. Her ears were helf out, and her trunk moved inquiringly towards the vehicle and then back under her stomach in a rhythmic swing.
　　I was fascinated by this close approach. Never before had I been able to see the hairiness around the jaw, nor smell the warm scent of elephant, which now reached me in concentrated waves. The mother elephant's steps were slow but determine, and brought her to within a couple of metres of me.
　　She gave the impression of being intensely curious about this metal object with had appeared in her world and behaved as if it were itself an animal. I wondered how far she would accept the situation and, if after all the centuries of men killing elephant, she would ever allow me to approach her on foot. To be able to move freely among the elephants without their minding was an exciting thought, but I certainly did not expect it would ever be possible.
　　11. It was the elephants' intention to___________.
　　A. feed on the grass
　　B. lie in the sunshine
　　C. swim in the pool
　　D. avoid the mud
　　12. The presence of the writer and his vehicle______________.
　　A. was not noticed by the elephants
　　B. made the leading elephant suspicious
　　C. made the adult elephants curious
　　D. frightened all the elephants away
　　13. How did the smaller elephant react to the truck?
　　A. She showed more curiosity than other elephants.
　　B. She kept her baby away from it.
　　C. After some hesitation she moved away with other elephants.
　　D. She rushed up to it excitedly.
　　14. While he watched the mother elephant approaching, the author______________.
　　A. was worried that the elephants were too close
　　B. found the smell very unpleasant
　　C. was impressed by the elephant's size
　　D. saw the details he had not noticed before
　　15. The author did not expect he would ever be able to_________________.
　　A. see the elephants killed
　　B. touch the elephants
　　C. walk about freely near the elephants
　　D. drive his truck close to the elephants