问题补充:
单选题Sofaratotalof19cases______andanother36peoplearebeingtreatedontheassumptionthattheyareinfectedwithLegionnairesDisease.A.were confirmedB.have confirmedC.are confirmedD.have been confirmed
答案:
D解析考查时态语态。So far与现在完成时连用,排除AC。句意:到目前为止一共19个案例已经被确认了,另外36个人正在被治疗。故应该使用被动语态。D正确。