Crying is hardly an activity encouraged by society. Tears, be they of sorrow, anger, or joy, typically make Americans feel uncom

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问题     Crying is hardly an activity encouraged by society. Tears, be they of sorrow, anger, or joy, typically make Americans feel uncomfortable and【C1】______. The shedder of tears is likely to apologize, even when a devastating(毁灭性的)tragedy was the provocation. The observer of tears is likely to do everything possible to put an end to the【C2】______outpouring. But judging from recent studies of crying behavior, links between illness and crying and the chemical composition of tears, both those responses to tears are often【C3】______and may even be counterproductive(使达不到预期目标的).
    Humans are the only animals【C4】______. known to shed emotional tears. Since evolution has given【C5】______to few, if any, purposeless physiological responses, it is logical to assume that crying has one or more functions that【C6】______survival.
    Although some observers have suggested that crying is a way to elicit assistance from others(as a crying baby might from its mother), the shedding of tears is hardly necessary to get help. Vocal cries would have been quite enough, more likely than tears to gain【C7】______. So, it appears, there must be something special about tears themselves.
    Indeed, the new studies suggest that emotional tears may play a direct role in alleviating stress. University of Minnesota researchers who are studying the chemical composition of tears have recently【C8】______two important chemicals from emotional tears. Both chemicals are found only in tears that are shed in response to emotion. Tears shed because of exposure to cut onion would contain no such ,【C9】______.
    Researchers at several other institutions are investigating the usefulness of tears as a means of【C10】______human ills and monitoring drugs.
A)attention I)definitely
B)overwhelming J)enhance
C)inappropriate K)aspiration
D)embarrassed L)emotional
E)diagnosing M)repelled
F)indispensable N)substance
G)rise O)increasingly
H)isolated
【C8】

选项

答案H

解析 空格所在句的主语是researchers,此处需要谓语动词的过去分词形式,且能与from搭配。isolated“使隔离,使孤立”符合,表示从动情的泪水中分离出两种重要的化学物质。
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