Question

【题目】Water， regulates body temperature，delivers oxygen all over the body，and assists in digestion，makes up more than 60% of the human body.

A. it B. which

C. what D. as

Answer 1

【答案】B

【解析】句意为：水占人体比重的百分之六十以上。它控制着人的体温，向全身输送氧气，并且帮助消化。分析句子结构可知，空处引导非限制性定语从句，且从句缺少主语，所以用关系代词，根据先行词是water可知选B。