Healthexpertsupto18peopleforpossibleexposuretoEbola(埃博拉)FivestudentsaftercomingintocontactwiththepatientDallasofficialssaid.A.observed;aremonitoringB.observed;havebeenmonitored
Health experts up to 18 people for possible exposure to Ebola(埃博拉) Five students after coming into contact with the patient Dallas officials said.
A. observed; are monitoring
B. observed; have been monitored
C. have observed; were monitoring
D. were observing; were being monitored
分 析:
句意:达拉斯官员说:健康专家正在观察18名可能接触到埃博拉病毒的人,在接触病人以后,五名学生正在被监视。根据动词said可知本句叙述的是过去正在发生的事情 ,所以都使用过去进行时。故D正确。
考点:
考查时态
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