Maria is speaking to her friend very softly in the library. She _____ know that it's a quiet zone.
must
He 's just left. He _____ be too far.
can't
The cafe is full, and there's a queue out the door. It _____ be very popular.
must
Mrs. Watsons always comes home in the early morning. She _____ work at nights.
must
The employees haven't complained, but they _____ be very happy about working on the weekend.
can't
A: Who's knocking at the door? B: It _____ be Simon. He's never here at this time.
can't
The painting is a masterpiece. It _____ be worth a lot of money.
must
Come inside and get warm. It _____ be freezing out there!
must
Rowan is constantly checking his watch and tapping his foot. He _____ be in a hurry.
must
It is snowing heavily, and there is no one in the street. It _____ be too dangerous to go out.
must
Do you remember my birthday party last year? You _____ remember! It was the same day as your graduation.
must
This bag's got Alicia's name on it. It _____ be Alison's.
can't
A: Whose is this raincoat? It _____ be Paul's. It's way too small for him.
can't
Jack's always on time, but today he's a bit late. The train _____ be late.
must
Kevin goes to the gym every day; he _____ be very dedicated to his fitness routine.
must
Judy was with me all day. She _____ be the thief.
can't