Раскройте скобки, употребляя глаголы в одном из следующих времен: Present Simple, Past Simple, Present Continuous или Past Continuous. (с 16)
16 What are you doing at this weekend? 17 When she opened the door, a man was standing on the doorstep. It was her uncle, but she didn't recognize him because he was wearing dark glasses. 18 Last night we went to a cafe to meet our friends.