-Look! The man at the gate be our teacher. He is always standing there every morning.
-No, it be him. He is having a meeting in the office now.
A. must; can't B. must; mustn't C. can't; can't D. can; couldn't
-Look! The man at the gate be our teacher. He is always standing there every morning.
-No, it be him. He is having a meeting in the office now.
A. must; can't B. must; mustn't C. can't; can't D. can; couldn't
A