Ответ:

  1. He knows German rather well, so it’s not difficult for him to express himself in German.
  2. Why is the girl crying? — She fell down and hurt herself.
  3. Did you have a nice time at the party? Did you enjoy yourselves?
  4. My finger is still bleeding. I cut myself when I was cutting bread.
  5. Why are you going to introduce yourself as Mrs Stone? This is not your name.
  6. It’s rather cold. Let them dry themselves well when they get out of the water.
  7. We followed the direction and finally found ourselves near Pete’s house.
  8. It’s dangerous to play with matches. One can burn oneself.
  9. Children, please behave yourselves. Don’t make so much noise.