问题补充:
—That must have been a pleasant experience.
— yeah, we ourselves.
A. have been enjoying
B. enjoyed
C. were enjoying
D. had enjoyed
答案:
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。