So far a total of 19 cases______ and another 36 people are being treated on the assumption that they are infected with Legionnaires Disease.


  1. A.
    were confirmed
  2. B.
    have confirmed
  3. C.
    are confirmed
  4. D.
    have been confirmed
D
考查時態(tài)語態(tài)。So far與現(xiàn)在完成時連用,排除AC。句意:到目前為止一共19個案例已經(jīng)被確認了,另外36個人正在被治療。故應(yīng)該使用被動語態(tài)。D正確。
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