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
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？