2. 职称英语
  3. It has been proved that once______oxygen, the brain dies.A、deprived ofB、having

It has been proved that once______oxygen, the brain dies.A、deprived ofB、having

游客2023-11-13  61
问题 It has been proved that once______oxygen, the brain dies.
选项 A、deprived of
B、having deprived of
C、depriving of
D、deprived
答案 A
解析 该题是语法结构题，考查复合句中的省略。在as if，if，once，when，while等引导的从句中，如果谓语动词为be或谓语部分的第一个动词为be，而主语又与主句的主语相同，那么从句的主语和动词be通常省略。该句完整的结构是：Once it(the brain)is deprived of oxygen，the brain dies．又如：While recovering from influenza，you should keep from getting wet or overtired．在流感康复的过程中，你要注意避免出汗或者过度劳累。因此，根据题意和语法规则，选项A为最佳答案。
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