如何保持教室清洁 How to keep classrooms clean

我们保持教室干净 We maintain a clean classroom ; We keep our classroom clean ; Us keep classrooms clean

保持教室干净 Keep the classroom clean

保持教室整洁 Keep the classroom clean ; Keep classrooms neat

保持教室干净整洁 Keep clean and neat classroom

保持教室光亮 Keep the classroom bright ; keep bright classrooms

我们应当保持教室干净 We should maintain classroom clean

请保持教室整洁 Please keep the classroom tidy ; Keep classrooms clean ; Please keep classrooms neat

你们应该保持教室干净 You should keep clean classrooms

必须保持教室清洁 Classrooms must be kept clean