【題目】Mankind must first of all eat, drink, have shelter and clothing ________ it can pursue politics, science, art and religion.

A. until B. unless C. before D. since

【答案】C

【解析】

試題分析：C考查介詞。A.until直到…才；B.unless除非；C.before在…之前；D.since自從…。句意：人類(lèi)在追求政治、科學(xué)、藝術(shù)和宗教這些東西之前必須先要有的吃、有的喝、有的住、有的穿和有的住。由該句句意可知衣食住行得到保障是追求其他東西的前提，故選C。

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