—Are you going to Guilin by plane?—It’s fast but expensive, so I’m not sure. I __________ take a train.

Today is Wednesday. He _______ be at home. He _____ be at school.

– Must I clean up the classroom right now, Miss Green?-- No, you ______.

A group of young men hope that getting this kind of job will finally be the ticket to success.

—Look! A book is on the floor. Whose is it?—It ______ be Rick’s. It has his name on it.