第10题: [单项选择]The old farmer was run down by a car. He was taken to the hospital and______ on by the chief surgeon right now. A. operated B. having been operated C. is operated D. is being operated 参考答案:D 答案解析:operated与并列连词and前的过去分词taken 共用一个系动词was,但这后一个过去分词的时间却为“right now”,“现在;眼下”,因此,operated 不符合题意。B项为现在分词的完