Water, we cannot live, exists in the form of liquid, gas or solid. A. from which B. on wh

Water, we cannot live, exists in the form of liquid, gas or solid.
A. from which
B. on which
C. without which
D. by which

A. from which B. on which (答案→)C. without whichD. by which解析：考查定语从句。本题定语从句的先行词是water，在非限制性定语从句中which指代先行词作为介词without的宾语。句意：水以液态，固态和气态的形式存在于世界上，如果没有了水，我们就不能生存。根据句意说明本句表示的是一种假设，故使用without。故C正确。

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