—      I borrow your camera? I want to take some photos. —Sure, here you are.

—Look! The man at the gate ______ be our headmaster. He is always standing there every morning.—No, it ______be him. He is holding a meeting in the office now.

—Where will you start your work after graduation?—Mmm, it's not been decided yet.I________continue my study for a higher degree.

The book ________ be Tom’s. Look! His name is on it.

---Mr. Wu, can I have a look at the scores?---Well, you are a senior, so I_____ hardly remind you that the scores are not open to students.