Ответ:

  1. His father bought a new car last month.
  2. I gave my mother a present for her birthday last Tuesday.
  3. We got to the village by train last month.
  4. The pupils went to the Winter Palace last week.
  5. Molly swept the floor half an hour ago.
  6. My friends stayed in after classes the day before yesterday.
  7. He drove Liz to work yesterday morning.