The number of workers in this factory _______ a lot this year. There were only a few workers in it two years ago.A.have increasedB.has increasedC.have risenD.has booked
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B解析考查固定搭配。The number of作主语,谓语动词用第三人称单数,故排除A和C.句意:这家工厂工人的人数今年增加了很多,两年前,仅仅有几个工人。根据句意排除D。