Вставьте артикль, где необходимо.
When we want to write ... letter, we take .... piece of ... paper and ... pen. We first write our-... ad­dress and ... date in ... right-hand corner. Then on ... left-hand side we write ... greeting. We may write, for instance, "My dear brother," "Dear Henry," etc., and then on ... next line we begin ... real letter. We must not forget to leave ... margin on ... left-hand side of ... page. At ... end of ... letter we write "Yours," and then we sign our name. We put ... letter into ... envelope and close ... envelope. On ... envelope we write ... name and address of ... person who will receive it. We stick ... stamp in ... top right-hand corner, and then we post ... letter.