помогите пожалуйста определить время на английском...

1. Who are you waiting for? I am waiting for my friend. Have you been waiting for a long time? Yes, I have been waiting for 1 hour already. Do you often wait for him here? Yes, I do.
2. What are you translating? I am translating an article. How long havу you been translating it? I've been translating it for 2 hours already. I translate three articles a week.
3. Don't enter the classroom. The students are taking an exam in there. They've been taking it since 9 a.m. Students usually take -5 exams every term.
4. Don't go outdoors! It's raining. It's been raining since early morning. It often rains in Moscow in autumn.
5. Can I talk with Nikolai? No, you can't, he's having dinner. Please, wait for a while. Has he been having dinner for a long time? Yes, he's been having dinner for half an hour already. He usuaaly has dinner at this time.