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- 问题详情：TherewillbeaspeechonourschoolplaygroundthisSaturdayafternoon,whichthemeis“Tocivilizeschoolyardismyresponsibility”．Alltheteachersandstudentsrequiredtoattend．Intheactivity,thefirsttwowinnerineachgradewillgivesuchvaluableadviceasfollows:weshould...
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