这几句话怎么说？

1、please sign in
2、please write down your name and the visiting company's name
3、please return the certification beore you leave
5、I am sorry you can't go in
6、it is the exit

Please return this certificate when you register to ask you to register a full name , to ask you to leave to visiting a company asking you please telephone having person to contact? Sorry, that you can not enter this is to utter

1. please check in
2. please leave your name and the visiting company's name
3. please return the certification when you leave.
4. Do you have the contact phone number?
5. sorry, you can't enter.
6. this is exit

1. Plese sign in .
2. Plese write down your name and the visit of company's name.
3. Plese return the certification before you leave.
4. Sorry,you can't enter.
5. This is exit.