It ＿＿＿＿＿＿＿＿＿ at Christmas that John Smith gave Mary a hbag A will be B may have had C might have been D must have

【参考答案】

答案：D

解析： 本题考查的是情态动词的用法。根据句子的语境，我们知道是在描述过去的事情......

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