—Hello, I’d like to see Doctor Smith at 3 o’clock tomorrow afternoon.
—Sorry, but he a patient at that time.
A. will operate on
B. will be operating on
C. will have operated on
D. will have been operated on
网友回答
A. will operate on
(答案→)B. will be operating on
C. will have operated on
D. will have been operated on
解析：可联系答.案.网客服索取。