The Internet and the effect brought about did a lot of good to our daily life and work. That is to say, the Internet has made a great difference in many aspectsA.thatB.whatC.whichD.it
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D解析试题分析：句意：网络及其带来的影响对我们的日常工作和生活很有益。也就是说，网络在许多方面产生了很大的影响。这是定语从句修饰先行词effect, effect在从句中做brought about的宾语，即：the effect that/which the Internet brought about. it指代前面提到的the Internet，此处省略了关系词that/which(做宾语可省略).故D正确。考点：考查代词和关系词的区别。