Read the following article and select the best answer. Article: Why can some people sleep through noises like a honking car or flushing toilet, while others are awakened by the lightest sound? To find the answer, sleep researchers at Massachusetts General Hospital conducted an unusual study of 12 self-described deep sleepers. After tests confirmed that the healthy volunteers were solid sleepers, they took part in a three-night study in the university's sleep laboratory. The participants spent the night in a big and comfortable room. But the room also included four speakers positioned near the top of the bed. During the night, the deep sleepers were subjected to 14 different recorded sounds, like street traffic, toilets flushing, an ice machine dispensing and an airplane flying overhead. Next door, the researchers monitored their sleep patterns and brain waves. As expected, all of the participants slept ly well, but there were differences in how they responded to the noisy interruptions. Some of the sleepers didn't wake up even when a sound was blasted at 70 decibels ; others were awakened by sounds at 40 or 50 decibels. The researchers discovered that the difference in a sleeper's reaction to noise could be predicted by the level of brain activity called "sleep spindles''. A sleep spindle is a burst of high-frequency brain activity coming from deep inside the brain during sleep. The source of the spindles is the thalamus, a part of the brain that sends sensory information to the rest of the cortex . Before the study, the Massachusetts researchers theorized that the spindles are the brain's way of preventing sensory information from passing through the thalamus and waking the rest of the brain during sleep. They found that the sleepers who experienced the most sleep spindles during the night were also the soundest sleepers and were least likely to be awakened by noise. Scientists already know that most people become lighter sleepers with age, most likely because older people experience less "slow wave sleep'', which is the deepest stage of sleep. People also produce... Question: From the passage we can predict _ . - more factors in influencing sleep spindles may be discovered - more solid sleepers will take part in experiments - sleep spindles will be applied to changing one's behaviors - deep sleepers will probably enjoy a more healthy life
more factors in influencing sleep spindles may be discovered

Read the following article and select the best answer. Article: We may be very pleased with the rapid progress we have made in every field of study. But the way to test a student's knowledge and ability still remains as poor as it was. We have almost done nothing to improve our examination system. It is well known that the examination system we are now using may be a good way of testing a student's memory, but it can tell you nothing about a student's ability. It does no good to students and teachers. As soon as a child begins school, he enters a world of examination that will decide his future of job. In fact a good examination system should train a student to think for himself. But it now does nothing about that. So students are encouraged to member what is taught. It does not enable them to gain more and note knowledge. The students who come out first in the examination often may not be the best in their studies. Besides, the examinations often force teachers to train students what to do with the coming examination from time to time. There must be some simpler and better way to test a student' s ability besides knowledge. And that is what we should do at once. Question: Now little has been done to _ . - decide a student's job - test a student's ability - test a student's knowledge - test a student's memory
test a student's ability

Q: Read the following article and select the best answer. Article: One day an ant was drinking at a small stream and fell in. She made desperate efforts to reach the side, but made no progress at all. The poor ant almost exhausted was still bravely doing her best when a dove saw her. Moved with pity, the bird threw her a blade of grass, which supported her like a raft, and thus the ant reached the bank again. While she was resting and drying herself in the grass, she heard a man come near. He was walking along barefooted with a gun in his hand. As soon as he saw the dove, he wished to kill it. He would certainly have done so, but the ant bit him in the foot just as he raised his gun to fire. He stopped to see what had bit him, and the dove immediately flew away. It was an animal much weaker and smaller than herself that had saved her life. Question: The ant could not reach the side though _ . - she could smell well - she asked the dove to save her - she tried very hard - she cried for help
A: she tried very hard

Q: Read the following article and select the best answer. Article: Money spent on advertising is money spent as well as any I know of. It serves directly to assist a rapid distribution of goods at reasonable prices, thereby establishing a firm home market and so making it possible to provide for export at competitive prices. By drawing attention to new ideas it helps enormously to raise standards of living. By helping to increase demand it ensures an increased need for labor, and is therefore an effective way to fight unemployment. It lowers the costs of many services: without advertisements your daily newspaper would cost four times as much, the price of your television license would need to be doubled, and travel by bus or tube would cost 20 per cent more. And perhaps most important of all, advertising provides a guarantee of reasonable value in the products and services you buy. Apart from the fact that twenty-seven Acts of Parliament govern the terms of advertising, no regular advertiser dare promote a product that fails to live up to the promise of his advertisements. He might fool some people for a little while through misleading advertising. He will not do so for long, for mercifully the public has the good sense not to buy the inferior article more than once. If you see an article consistently advertised, it is the surest proof I know that the article does what is claimed for it, and that it represents good value. Question: From the passage, we can draw a conclusion that _ . - the most importance of advertisements is to lower the cost of many services - the twenty-seven Acts of Parliament made misleading advertisements unable to exist - advertising assists a rapid distribution of goods, thereby do good to the import at good prices - advertising does a lot for the material benefit of the community
A: advertising does a lot for the material benefit of the community