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of non-REM sleep .
For example, it has long been known that total sleep 46 is 1OO percent fatal to rats, yet ,47 exanlination of the dead bodies , the animals look completely normal . A researcher has now 48 the mystery of why the aninlals die. The rats 49 bacterial infections of the blood ,50 their immune systems--the self-protecting mechanism against disease--had crashed.
41 . (A)Either (B)Ndther (C)Each tn)Any
42 . (A) intended ( B)required ( C) assumed ( D) inferred
43 . (A) subtle (B)obvious (C)mysterious (D)doubtful
44 . (A) maintained ( B) described (C)settled (D)afforded
45. (A)in the light (B)by virtue (C)with the exception (D)for the purpose
46 . (A) reduction ( B) destruction (C) deprivation (D) restriction
47. (A)upon (B)by (C)through (D)with
48. (A)paid attention to (B)caught sight of tc)laid emphasis on (D)cast light on
49 . (A) develop (B)produce (c)stimulate (D)induce
50. (A)if (B)as if (C)only if (D)if only
Part Ⅲ Reading Comprehensinn
Passage l
Money spent on advertising is money spent as well as any I know of. It serves directly to assist a rapid distribotion of goods at reasonable price, 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 labour, 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 licence 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 gov-
ern 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 , an
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