2. 外语
  3. Medical researchers in Boston recently found out【C1】______ millions of people already knew: drinking is good for you. The docto

Medical researchers in Boston recently found out【C1】______ millions of people already knew: drinking is good for you. The docto

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问题     Medical researchers in Boston recently found out【C1】______  millions of people already knew: drinking is good for you. The doctors【C2】______  up with the following ideas and suggestion: one【C3】______  six drinks is good for you;【C4】______  drinking, or seven to thirteen drinks a week is not good; but having【C5】______  than thirteen drinks a week is downright【C6】______  because drinking too much wine could cause dementia, an illness that can【C7】______  your brain,【C8】______  your ability to drink or act normally.
  【C9】______  more than 300 senior citizens over many years, a group of researchers【C10】______  that a few drinks a week is good for you【C11】______  it prevents hardening of the arteries, a major【C12】______  to such cardiovascular(心血管的) problems【C13】______  heart attacks and strokes. Strokes, especially, are a major【C14】______  of non-genetic dementia,【C15】______  occurrence may be reduced by【C16】______  amounts of alcohol.
    Doctors pointed out that,【C17】______  hearing this news, older adults should not rush out to buy six【C18】______. Those who drank in the【C19】______  were long time drinkers. Any new user of alcohol should first【C20】______  a physician, they cautioned.
【C9】
选项 A、surveying
B、to survey
C、studying
D、to study
答案C
解析
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