There's a bit of traffic, so I ________ arrive in time.
must not
may not
Paul is behaving in a very unusual way. I think he _________ drunk again.
can be
might be
can't be
He ________ know the answer, he's the best in the class.
can
might
must
You should pick up the phone. It ________ be an important call.
can't
might
can
He ________ be at the gym now. Sometimes he goes there at this time.
might
must
can't
You _________ be right, but it's better if we check.
can
can't
might
If Susan said that, it ________ true. She never lies.
might be
must be
can be
This is not possible. You _______ be serious!
must
can't
might not
He ________ be in class. I saw him at the library a minute ago.
can't
must
might not
Sorry, but I'm not Connor. You _________ me for someone else.
must be confusing
must confuse
might be confusing
She ________ be in love with him. She told me she hates him.
can't
must
might not
You have walked for ten hours. You _________ exhausted.
can't be
can be
must be
He ________ his son, they look completely different.
might be
can't be
must not be
I wouldn't swim in this river if I were you. It _________ dangerous.
might be
can be
The phone is ringing. It _______ be Charlotte; she said she would call this morning.
must
can
can't
He________ be very proud of you right now. You disappointed him.
might
can't
must not
If he drives a jaguar, he _______ be quite rich.
might
can't
must
I'm not sure I trust Peter. He ________ the person we think he is.
must not be
might not be
can't be
I think there _________ a mistake in your tax return. You should check it.
might be
can't be
can be
A: Who's at the door? B: I don't know; it_________ be John.
must
can't
may