同等學歷模 1

Only three strategies are available for controlling cancer ， prevention ， checking and treatment ． A major cause of lung cancer is reliably known ； there is no good evidence that screening is of much help ； and treatment 56 in about 90 percent of all cases ． At present ， therefore ， the main strategy must be 57 ． The research over the past few decades has produced （ or suggested ） some important progress in prevention ， screening or treatment ． 58 ， however ， we consider not what research may one day offer but what today's knowledge could already deliver that is not being delivered ， then the most practicable and cost ． effective opportunities for 59 premature death from cancer ， especially lung cancer ， probably involve neither screening nor improved 60 ， but prevention ．

This conclusion does not depend on the unrealistic assumption that we can 61 tobacco ． It merely assumes that we can reduce cigarette sales appreciable by raising prices or by 62 the type of education that already appears to have had a 63 effect on cigarette consumption by white-collar workers ， and that we can substantially reduce the amount of tar 64 per cigarette ． The practicability of preventing cancer by such measures applies not only in those countries ， 65 the US ， where ， because cigarette smoking has been common for decades ， 25-30 percent of all cancer deaths now involve lung cancer ， but also in those where it has become 66 only recently ． In China ， for example ， lung cancer as yet accounts for only about 5-10 percent of all cancer deaths ． Countries where cigarette smoking is only now becoming widespread can expect enormous increases in lung cancer during the 1990s or early in the next century ， 67 prompt effective action is taken against the habit ， such increases are already plainly evident in parts of China ．

There are four reasons why the prevention of lung cancer is of such importance ： first ， the disease is extremely common ， causing more deaths than any other type of cancer now 68 ； secondly ， it is generally incurable ； thirdly ， effective ， practicable measures to reduce its incidence are already reliably known ； and finally ， 69 tobacco consumption will also have a substantial 70 on many other diseases ．

56 ． A ． fails B ． succeeds C ． results D ． rises

57 ． A ． treatment B ． cure C ． prevention D ． diagnosis

58 ． A ． Although B ． If C ． Since D ． Unless

59 ． A ． resulting B ． deducing C ． avoiding D ． causing

60 ． A ． health B ． control C ． environment D ． treatment

6 1 ． A ． eliminate B ． abolish C ． cut down D ． cope with

62 ． A ． dealing B ． expanding C ． hardening D ． inspecting

63 ． A ． innocent B ． positive C ． 1ikely D ． moderate

64 ． A ． contained B ． delivering C ． adopted D ． regulated

65 ． A ． for example B ． such as C ． as well as D ． but

66 ． A ． sensitive B ． tight C ． widespread D ． rough

67 ． A ． if B ． unless C ． provided D ． while

68 ． A ． has B ． emerges C ． causes D ． does

69 ． A ． yielding B ． handling C ． increasing D ． reducing

70 ． A ． trouble B ． margin C ． impact D ． threat

56 ． A 57 ． C 58 ． B 59 ． C 60 ． D 61 ． A 62 ． B 63 ． B 64 ． A 65 ． B

66 ． C 67 ． B 68 ． D 69 ． D 70 ． C