專家解析大學(xué)英語四級(jí)考試歷年閱讀真題(十)13

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34. In the experiment described in Paragraph 3, the video-watchers experienced a downturn in the antibody because ________.
    A) the video was not enjoyable at all
    B) the outcome was beyond their control
    C) they knew little about surgical procedures
    D) they felt no pressure while watching the video(B)
    35. Dr. Bruce McEwen of Rockefeller University believes that ________.
    A) a person’s memory is determined by the level of hormones in his body
    B) stress hormones have lasting positive effects on the brain
    C) short bursts of stress hormones enhance memory function
    D) a person’s memory improves with continued experience of stress(C)