【題目】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

【答案】B

【解析】句意為：水占人體比重的百分之六十以上。它控制著人的體溫，向全身輸送氧氣，并且?guī)椭�。分析句子結(jié)構(gòu)可知，空處引導(dǎo)非限制性定語從句，且從句缺少主語，所以用關(guān)系代詞，根據(jù)先行詞是water可知選B。

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