题目内容
【题目】_______ human beings use it in a wrong way, like we did with nuclear technology, the advancement of science and technology has never led to decline of human development.
A. While B. Unless
C. As long as D. Before
【答案】B
【解析】
试题分析:考察连词。A.当…时候;B.除非;C. 只要;D.在…之前;unless是从属连词,引导条件状语从句,含有否定意义,相当于If的条件状语从句的否定形式。句意:除非人类错误的运用科技,例如像我们使用核技术那样,科技的发展永远都不会减缓人类的发展。故选B。
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