Which sentences are opening (0) I closing (C) remarks? 1 I must go now. 2 It was nice to hear from you.

1.I must go now. — С — Я должен сейчас идти.
2.It was nice to hear from you. — С — Было приятно услышать тебя
3.Well, I think that’s about it. — С — Ну, я думаю, это все.
4.How are you? — О — Как дела?
5.Thanks for your email. — О —  Спасибо за письмо
6.I haven’t heard from you for ages. — О — Давно не слышал тебя.
7.Write soon. — С — Пиши
8.Well, that’s all for now. — С — Ну, это все.