外研版英語四下一起module1unit2課件2(完整版)
【正文】 et. ? You must keep quiet. Don’t run in the classroom. ? You must not run in the classroom. No littering ? You must not litter. We mustn’t climb the trees in the park. In the park Don’t climb the trees. Example: We _______________in the park. In the park Don’t ride a bicycle. Now you try. mustn’t ride a bicycle We ________________________ .
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