Вставьте нужный вспомогательный глагол,соответствующий времени (Present Simple, Present Continuous, Present Perfect, Past Simple):
1)Olga...swimming now.2) The weather...hot last summer.3) He... a teacher two years ago.4) Where... your sisters at the moment?5) ...you seen this cartoon? 6)They... cleaned the house. 7)I... looking after my little brother now.8) She... cooking,when I went in the park. 9)Bob and Alice... watching the new opera now. 10)He... at his granny last summer.