Complete the sentences with the correct forms of the given verbs.

Two days ago a funny story happened. My mum *was cooking* when I came home. I washed my hands and started to help her. My dad *was sleeping* while we *were talking* and cooking. Suddenly, his phone rang. He got up and answered the call. It was his boss. He told my dad that he *was driving* home when the accident *happened*. My dad was worried. He went out, took the car and went to help his boss. When he *arrived* at the hospital, he *didn't find* anybody. My father didn't understand anything and drove back home. When he *came* home, his boss and all his colleagues *were hiding* behind the kitchen table. They had decided to make a surprise party.