With the introduction of the computer, libraries today are quite different from ______ they were in the past.

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问题 With the introduction of the computer, libraries today are quite different from ______ they were in the past.

选项 A、that
B、which
C、what
D、those

答案C

解析 名词性从句题。宾语从句可由连接词that引导,但that仅起连接作用,常可省略。若连接词在句中兼起一个句子成分的作用,应用what.分析本题句子结构发现,连接词在句中作表语,故选C项what。
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