— What did he think of the trip to Beijing last month？— He had such a good time he visite

— What did he think of the trip to Beijing last month？
— He had such a good time he visited the Great Wall.
A. until
B. that　　　　
C. where
D. when

A. untilB. that　　　　C. where(答案→)D. when解析：考查连词：A. until直到，B. that那C. where哪里，D. when 当….时候，句意：--你认为上个月在北京的旅行怎么样？--参观长城的时候他玩得非常的高兴。选D。

哦，回答的不错