If a school doesn't have enough garbage bins, students have fewer places to put their rubbish., If people burn wet firewood, they produce more smoke., we pollute nature If we leave garbage at the river, classrooms get messy If students leave paper scraps, If a person leaves fires burning, forests burn.

green issues zero conditional

由
列印
嵌入

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?