Ответ:

2)Could you stop using my lipstick instead of yours?

3)Mike and Mark's bedroom hasn't been tidied up for ages

4)Our neighbors had a very loud party in their flat yesterday.

5)My father's best friend(долго думал что тут не так, пока не заметил, что апостроф неверно стоит)

6)I'd rather borrow yours

7)Tomorrow's meeting has been postponed(тут не совсем верно построено предложение)

Объяснение: