Question

—That must have been a pleasant experience.
— yeah, we         ourselves.

A．have been enjoying	B．enjoyed
C．were enjoying	D．had enjoyed

Answer 1

B

试题分析：“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。