Ребята помогите пожалуйста !!!!!
Задания: must, might (not), can't or could (not) + have+been
1.They recently found an ancient site in Peru. It's almost 3000 years old and it (be) a religious site, but we can't be sure
2. I had my wallet an hour ago, but it's not here now. I.....(leave) it in that shop!
3. Sally hasn't called me. She.... (not get ) my text message.
4. Somebody ....... (take) the book from her bag. Or maybe she left it on the bus.