What do you think at this time last night?
A. has he done
B. he has done
C. was he doing
D. he was doing
网友回答
A. has he done
B. he has done
C. was he doing
(答案→)D. he was doing
解析：考查时态。句意：你认为昨天晚上的这个时候他在做什么？根据句意说明是指在昨天晚上的这个时候，这是一个过去的时间点，所以使用过去进行时；故D正确。