摘要: -I heard they went skiing in the mountains last winter. -It true because there was little snow there. A. may not be B. won't be C. couldn't be D. mustn't be [解析] couldn't+动词原形.表示对过去情况的否定推测.根据there was little snow说明对方所说的去山里滑雪这件事不可能是真的.另外.may not be表示对现在情况的否定推测.答案为C.

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