2. Did you read "The Murder of Roger Ackroyd" by Agatha Christie? (Вопрос в Past Simple) - No, I haven't read (didn't read) it yet. (Past Simple -  ответ на вопрос) But I heard (Past Simplе - факт) that it is (It - 3-е лицо => is) a very interesting book. I will read it as soon as I get it. (Future Simple)

3. When we came to the station, the train has already arrived. (Past Simple + Present Perfect - сочетание времен. Факт + Результат). The passengers hurried (Past Simple) to occupy their seats in the carriages.

4. The concert was a greater success than we expected (Past Simple). We were very glad.

5. He told (Past Simple - факт) me that if no one comes (I Кондишнл - [If Present Simple, I Future simple]) to meet me at the station, I can (Present Simple)leave the suitcases in the checkroom and go to my hotel where he will reserve (reserved тоже правильно. Future Simple/Past Simple) a room for me.

6. Lanny has returned (Present Perfect - результат) home after seven years of absence. During these sever years he had been studying (Past Perfect Continuous - длительное завершенное действие в прошлом) in Cape Town where his people sent him (Past Simple - факт). Lanny was glad at the thought that he did what they hoped he would do and that soon he was among his people again. (Past Simple + Future in the Past - сочетание времен)