—Who’s that man? Is he Mr. Brown?

—That     be Mr. Brown. He never walks this way.

A. can’t               B. mustn’t             C. must         D. can

— Who’s that man in our classroom? It ________ be Mr. Brown. He is much taller.
— You mean the man in white? He is an exchange student from England.

–Who’s that boy?
–Liang Bo. He is _____ very popular singer in Voice of China.