Nowadays, a graduate with a master’s degree_____ fail to find a high--paid job , which discourages a lot of college students.

---Dad, must we wait until the light becomes green?---Yes, I’m afraid we ______. That’s the traffic rule.

——Who’s the man over there?Is it Mr. Black?——It______be him. He’s much taller.

 The man in the office ____be Mr. Black because he phoned me from London just now.

–Whose shirt is this?--It _______ be Li Lei’s. It is too big for him.