Ответ:
1. When we (came) to the station, the train had already (arrived). The passengers (were hurrying) to occupy their seats in the carriages.
2. The concert (was) a greater success than we (had expected). We were very glad.
3. He (told) me that if no one (came) to meet me at the station, I (could) leave the suit-cases in the cloak-room and go to the hotel where he (had reserved) a room for me.
4. He (was) here five minutes ago, but you (were) out. He (asked) me to tell you that he (would come) again tonight.
5. Lanny (returned) home after seven years of absence. During these seven years he (had been studying) in Cape Town where his people (had sent) him. Lanny was glad at the thought that he (had done) what they (had hoped) he (would do) and that soon he (would be) among his people again.
6. (Have you read) «The Murder of Roger Ackroyd» by Agatha Christie? — No, I (have not read) it yet. But I (have heard) that it (is) a very interesting book. I (will read) it as soon as I (get) it.