Choose the correct option.

1. Carrie isn't here. She must have gone/must go out.

2. I was listening to music when Toby called/was calling.

3. By the time we got to the cinema, we missed/had missed the beginning of the film.

4. I don't believe it, it mustn't /can't be true.

5. I'm not sure, but somebody can/could have climbed in through the window.