Раскройте скобки. what (to happen) yesterday?-when i (to sleep) yesterday, somebody (to call). it (to be) my friend.

- What happened yesterday? (What did happen yesterday?)- When I was sleeping yesterday, somebody called. It was my friend.I stood up (*it\'s better to say \"I got out of bed\") and we went to the cinema.- What are you doing now?- And now I’m writing a letter to my sister.