Rewirte the sentences so that it stays the same meaning

Rewirte the sentences so that it stays the same meaning
  1. Our teacher always a careful driver.
   Our teacher always drivers................................................
  2. Be careful or your'll fall off your bicycle.
   If you are not.......................................................................
  3. My mother washed clothes by hand last year, but now she no longer doesnit.
   My mother used..................................................................
  4. Is Shanghai the largest city in population ?
   Shanghai is..........................................................................
  5. Watching film is very interesting.
   I am interested.....................................................................