单选题 With the introduction of the computer, libraries today are quite different from ______ they were in the past.
A) that B) what C) which D) those

【正确答案】 B

【答案解析】句意：随着计算机的引入，现在，图书馆跟过去相比很不一样。That，those不能作介词宾语，排除A、D。此处不是定语从句，故不选C)which；what可作介词宾语，故选B项。