School rules

What are the rules at Kitty's school? Do you know how to use the modals 'must' and 'mustn't'? Watch the video and find out!

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观看视频,学习如何使用 'must' 与 'mustn't' 表达规则。你可以正确的使用'must' 与 'mustn't' 吗?

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English courses for children aged 6-17

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