分类：教育/科学-学习帮助
问题：关于operate的一道单选题Forthis,she______ 
For this ,she __________twiceA was orated  B was operated onC has been operated on  D has been operated答案C帮忙解释一下,是不是有什么短语在里面呀!
回答：选C。operate on 是做手术的意思，这里要用被动语态，而且有twice，要用完成式，所以选C。整句的意思是：因为这个原因，她已经两次上手术台了。