. --- How about the food I ordered? I for 20 minutes.
--- Sorry, sir. I will be back with your order in a minute.
A. have waited
B. have been waiting
C. will have waited
D. was waiting
网友回答
A. have waited
(答案→)B. have been waiting
C. will have waited
D. was waiting
解析：可联系答.案.网客服索取。