2. 职称英语
  3. ______much is known about what occurs during sleep, the precise function of slee

______much is known about what occurs during sleep, the precise function of slee

游客2023-11-13  26
问题 ______much is known about what occurs during sleep, the precise function of sleep and its different stages remains largely in the realm of assumption.
选项 A、Because
B、Since
C、As
D、While
答案 D
解析 状语从句。根据句义可知，空处所缺为让步状语从句的连接词，故选while(尽管)；much as也可引导让步状语从句，但as much不可以。
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