1 Where was Peter yesterday? He ... (be) at school. The school year started a week ago.
2 I’m absolutely sure! They ... (arrive) yesterday. I saw their tickets.
3 The course ... (begin) on the fifth of September but I’m not so certain about it.
4 Are you joking! Nick ... (go) to Moscow last week. He’s supposed to be at work now.
5 They ... (come from) London, but I’m not sure.
6 We ... (take) the wrong turn. We should be there by now.
7 They ... (miss) their train. Otherwise they would be here by now.
8 It... (be) Masha who answered the phone because she’s away.
9 I can’t find my cat anywhere. She ... (get out) through the window.
The opening is too small.