题目

Computers and the advantage _________ gave us _________ being made better use of presently. A.that;is　      B.they;are C.it;was　      D.which;were  答案：B 解析: 定语从句及主谓一致的运用。they代表computers,后者presently的出现表明是现在被更好的利用,且主语为复数。

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