【題目】_______ 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】

試題分析：考察連詞。A.當(dāng)…時候；B.除非；C. 只要；D.在…之前；unless是從屬連詞，引導(dǎo)條件狀語從句，含有否定意義，相當(dāng)于If的條件狀語從句的否定形式。句意：除非人類錯誤的運(yùn)用科技，例如像我們使用核技術(shù)那樣，科技的發(fā)展永遠(yuǎn)都不會減緩人類的發(fā)展。故選B。

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