2. 专升本
  3. With the introduction of the computer, libraries are quite different from ______ they were in the past.

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

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问题 With the introduction of the computer, libraries are quite different from ______ they were in the past.
选项 A、that
B、what
C、which
D、those
答案B
解析 分析句子结构可知，from后面是一个宾语从句，空格处所填的引导词既作from的宾语，又在从句中作表语。that引导宾语从句时，在从句中不作成分，故排除；which表示选择关系，不符合题意，也排除；what可以引导宾语从句，在从句中作主语、宾语、表语。故选B。
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