More than one worker sent to the training center to improve their working skills in the past three y...
2022-11-21 12:26:45 210次 2013-2014学年福建省高三第六次月考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
More than one worker sent to the training center to improve their working skills in the past three years.
A. is B. has been
C. are D. have been
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