You must give it a clean before you return it.
在归还以前，你必须把它擦洗干净。
It is certain that a clean city can give people a good impression.
一个干净的城市肯定能给人们一个好的印象。
Also you can clean and organize your entire desk and give it a new look.
同样您还可以清理和布置一下您的整张桌子，让桌面焕然一新。
Let's clean it up now. I'll give you a hand.
我们现在就来打扫吧！我帮你。
Let's clean it up now. I'll give you a hand.
我们现在就来打扫吧！我帮你。
应用推荐