Question

【题目】The doctors ____________ (operate) on him successfully. At present, though he is breathing slowly, he is surely out of danger.

Answer 1

【答案】have operated

【解析】

句意：医生们已经成功地对他进行了手术。目前，尽管他呼吸缓慢，但他肯定已经脱离危险。

考查现在完成时，operate on sb. 给某人做手术，根据后面一句可知是前面手术成功后所带来的影响，所以用现在完成时，故答案为have operated。