Odpowiedź:
1 Leo can't have been at the office that day. I saw him at a conference outside town.
2 They may have talked about this issue in the meeting yesterday, but I can't be certain.
3 I must have left the notebook at home. It's definitely not here.
4 The office is empty. The employees could have gone for lunch.
5 Jack didn't come to work today. He might have caught the flu again.
6 Mary can't have read this book already. She only borrowed it yesterday.
Wyjaśnienie:
