Researchers produced evidence to support what most of us already knew—that a cup of tea is the answer to any crisis. Dr. Mal

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问题     Researchers produced evidence to support what most of us already knew—that a cup of tea is the answer to any crisis.
    Dr. Malcolm Cross, a psychologist at City University of London, tested the anxiety levels of a group of people following a 【C1】________situation and revealed that even a single cup of tea has a 【C2】________calming effect. His team gave 42 volunteers a mental arithmetic exam and【C3】________offered half of them a cup of tea and the other half a glass of water. The water group’s anxiety levels soared【C4】________25 percent compared to before the task,【C5】________the tea group actually reported a four percent reduction in anxiety—despite the difficult test, they were more relaxed than when they started.
    According to a survey carried out for the research, 68 percent of Britons【C6】________tea in a dilemma, making it the nation’s most common response to trouble of 【C7】________kind. About 60 percent said the promise of comfort and warmth was the main reason for putting the kettle on. "The【C8】________of making and drinking tea—particularly during times of stress—is at the very【C9】________of British culture," Cross said.
    This study shows that the social psychological【C10】________of tea enhance the effects of its chemical make-up on our bodies and brains.
【C5】

选项 A、while
B、however
C、meanwhile
D、nevertheless

答案A

解析 while:而,作为连词有转折的意思,however作转折意思使用时应有逗号。故选A。
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