The phone is ringing. It _______be Charlotte; she said she would call this morning.
must
She _______ be in love with him. She told me she hates him.
can't
He ______ be at the gym right now. Sometimes he goes there at this time.
might
This is not possible. You ______ be serious!
can't
If he drives a jaguar, he ______ be quite rich.
must
You should pick up the phone. It ______ be an important call.
might
He ________ know the answer, he's the best in the class.
must
You_______ be right, but it's better if we check.
might
He ______ be in class. I saw him at the library a minute ago.
can't
A: Who's at the door? B: I don't know; it _________ be John.
might
Paul is behaving in a very unusual way. I think he ______ drinking again.
might be
I think there ______ a mistake in your tax return. You should check it.
may be or might be
Sorry, but I'm not Connor. You ______ confusing me for someone else.
might be
