【題目】Some scientists believe that it won’t be long ________ artificial intelligence completely takes the place of human beings.

A.beforeB.afterC.sinceD.when

【答案】A

【解析】

句意：一些科學(xué)家認(rèn)為用不了多久人工智能就能完全取代人類。

考查連詞的用法。before在…之前；after在…之后；since自從…以來(lái)；when當(dāng)…時(shí)候。根據(jù)Itis/wasnot(won'tbe)longbefore…“不久就……”是英語(yǔ)中的常用句型，故選A。

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