题目内容

Some scientists believe that it won’t be long _______ robots are widely used in all walks of life．

A． since B． after C． before D． until

C

【解析】

试题分析：考查连词辨析。A自从B在…之后C在…之前D直到，句意：一些科学家相信在机器人广泛用于生活各方面之前不会过很久。故选C

考点：考查连词辨析

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