—I didn’t tell him the news.—Oh, you ought _______.

— Mr. Wang, I got zero on Answering Sheet One. Could you help me correct it?— I’m sorry, but it ______ be marked by the machine. Mark your test number with a pencil 2B next time.

—How much shall I pay for the telephone call? —You  _____. It's free.

— Li Lin hasn’t turned up yet, but he promised to come to the party.— He ______ home. He is a man of keeping his word.

－Is that Mary?－No, it _______be her. She has gone to Tokyo.