—Do you think the phone is genuine(真品)? —I don’t think it ______ be a fake, as this shop has a very good reputation. 

--Who’s the man over there?Is it Mr Black?----It _____be him.He’s much taller.

If you love someone, why ______ you chain him to your side, control his emotion, and even make him center on you?

I am fond of my sister but she has one serious shortcoming. She _________ be really stubborn.

--Who’s singing in the next room? Is it Lucy?---It       be her. She has gone to New York.