问题
选择题
—That must have been a pleasant experience.
— yeah, we ourselves.
A．have been enjoying
B．enjoyed
C．were enjoying
D．had enjoyed
答案
答案：B
题目分析：“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。
点评：通过时间状语、句意以及上下文的联系来判断时态。