The company had about 20 notebook computers but only one third _________ used regularly. Now we hav...
2023-02-11 03:48:50 71次 广东省实验中学2009-2010学年度高一下学期考试 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The company had about 20 notebook computers but only one third
_________ used regularly.
Now we have sixty working all day long.
A．is B．are C．was D．were
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