You___ before you come in.

You___ before you come in. Please_____on the door before you come in. I hope you'll come and see us again.Drop in any time you___ 英语翻译please [ ] [ ] the door before you come in. it's _______polite to say 'may i come in' before you come in when you go,you___.A,come,B,leave C,arrive i called you yesterday,but you___(not,be) in. --Must I hand in my homework now?--No,you___.You 翻译：进来前请敲门.Please______ _____the door before you come in. We make it a rule to knock at the door before you come in.I Tom,____(knock)on the door before you come in next time you do not need to stay up before a test.可以改成什么 you___ ___ _