Помогите по английскому, пожалуйста.

1He has never seen such a big room.2Mr. Brown is a teacher. He teaches my brother.3Mr. Brown has been a teacher since 1995.4Mr. Brown has been a teacher for 10 years.5Mr. Brown was a teacher ten years ago, but now he is a businessman.6We live in Moscow. You can visit us any time you want.7We have lived in Moscow for five years.8They have lived in Moscow for a long time.9Did you live here five years ago?10How long have you lived here?