The inner connection for the entire area when there was a sudden power cut yesterday.
A. lost
B. was lost
C. had lost
D. had been lost
网友回答
A. lost
(答案→)B. was lost
C. had lost
D. had been lost
解析：考查时态：句意：昨天突然停电，我们失去了网络连接。lost 在这里做形容词用，丢失了，那么前边要有be动词来构成主系表的结构，when引导的时间状语从句是一般过去式，和主句的动作同时发生，所有前面要有was