The company had about 20 notebook computers but only one-third used regularly.Now we have 60 working all day long. A.is B.are C.was D.were 答案 D 解析 本题考查主谓一致及动词的时态.当分数.百分数作主语时.要根据其后面的名词来决定其谓语动词的单复数.此处one-third应是one-third of the notebook computers的省略形式.因此谓语动词用复数.且句子的时态用了过去时.所以D项正确. 【查看更多】
