◎ 题干
— Do you still remember the day when we went to the Great wall?
— I can't remember it well, but _____ it have been sometime last year?

[     ]

A. would
B. must
C. could
D. should
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Do you still remember the day when we went to the Great wall?— I can't remember it well, but _____ it have been sometime last year? [ ]A. would B. must C.…”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。