Only some of the students have done a first aid course but most of the students haven't done a first aid course.
→Only some of the students have done a first aid course but
most haven't
most haven't
.

【答案】most haven't

【解答】

【点评】

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发布：2024/4/20 14:35:0组卷：4引用：6难度：0.7

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Only some of the students have done a first aid course but most of the students haven't done a first aid course.→Only some of the students have done a first aid course butmost haven'tmost haven't.