— What did he think of the trip to Beijing last month？— He had such a good time ________ he visited the Great WallA.untilB.that C.whereD.when
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D解析试题分析：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。考点：考查连词