Дам 15 баллов. Помогите​

1. Let's meet at five o'clock.
2. Now they are having dinner.
3. Will you go to the library after school tomorrow?
4. Do you get up this morning at 7 o'clock? 5. Yesterday I didn't meet my best friend.
6. I have already completed my household duties.
7. He didn't visit the British Museum.
8. Now we were talking about famous writers.
9. We have already come there yet.
10. When I return, I will call you then.