1. No wonder he is very tired. He has been working hard for the last three months.
2. My mother (is coming) to stay with us next weekend.
3. Do you often ( get) letters from her? - Not very often.
4. If we (do not get) to the station before seven we (shall miss) the train.
5. Mary (is) in the kitchen now. She (is putting) the supper on a tray to take it to the dining-room.
6. Do you (hear) anything? - Yes,I (can hear) soft music.
7. I (have not seen) him since we finished school
8. Is everybody here? - No, Mr.Black (has not come) yet.
9. I (lived) in London many years ago.