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  3. Never before______ available for quick and easy access in so many different fields of study.

Never before______ available for quick and easy access in so many different fields of study.

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问题 Never before______ available for quick and easy access in so many different fields of study.
选项 A、so much free information were
B、were so much free information
C、has so much information been
D、so much free information has been
答案C
解析 表示否定或部分否定的词或词组放在句首时，句子应部分倒装，即将系动词be、助动词、情态动词提至主语之前，排除选项A、D。由句中的Never before和句意可知，句子应用完成时。故选C。
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