Has the doctor _____sent for?A.referred to been B.referred to be请_英语解答

Has the doctor _____sent for?A.referred to been B.referred to be
请具体把为什么这么选讲得具体一些好吗?

人气：422 ℃　时间：2020-03-24 16:44:35

解答

A
referred to是doctor的后置定语,意思是提到的那个医生
Has.been.完成时