Question

(   ) 6. ―Could you tell me why I am constantly yawning this afternoon?

―Yawning functions as a( n)        that your body lacks oxygen and needs a rest.

A. instruction    B. indication    C. reaction    D. direction

Answer 1

6. B考查名词的用法。instruction指令，指示，用法说明；indication暗示，征兆，迹象；reaction反应，感应；direction方向，用法说明。句意：—— 你能告诉我为什么下午我不断地打哈欠吗？—— 打哈欠的作用在于表明你的身体缺乏氧气，需要睡眠。