—That must have been a pleasant experience.
— yeah, we ourselves.
A. have been enjoying
B. enjoyed
C. were enjoying
D. had enjoyed
网友回答
A. have been enjoying
(答案→)B. enjoyed
C. were enjoying
D. had enjoyed
解析：“must have been”表示对过去发生的事情或状态进行推测，所以判断出是发生在过去的事情，故用一般过去时。