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15.They in search of a cure for Ebola(埃博拉)now.

分析 他们现在在寻找治疗埃博拉的方法.

解答 答案:They后面加are,考查谓语动词的用法,in search of"寻找",介词短语,不能直接充当谓语动词,可以放在be动词后做表语,由now可知时态用一般现在时,主语是they,因此在其后面加are.

点评 考查谓语动词的用法,要注意区分句子成分.

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