1. When I was a child,  I used to go swimming in the river.
  2. Johny once went to Alaska. It was too cold for him.  He was not used to living in cold temperature.
  3. I'm American. I'm used to driving on the right.
  4. My best friend used to drink  tea when he was a child.
  5. I am used to the weather in this country. So, I feel comfortable with it.