Verb conjugation of "hiss" in English

Open the Word Program (press 'Start' button at the bottom left of screen, choose the menu 'Programs'. In the Word document, once a white new document has appeared, press 'edit menu' again and paste the contents.
My correction were added and highlighted with yellow markers and attached to this email. Tell me now if you have any questions about grammar rules, since I was a teacher 10 years ago.
What problems did you have when you had to share your flat with your mates? Probably you were not used to it. We say that when we live close we usually discover many issues that were not known.