Tom is really a polite boy. He ________ “Good morning" to every teacher every day.
--! Where is my pencil? --,I don’t know.
This is Jim. ______ twelve.
Boys and girls, I have ________ to tell you. A. important something B. something important C. anything important
--Must I come at four o’clock? -- Oh, no, you ______. A. can’t B. mustn’t C. needn’t.
I’m sorry I kept you ______ for a long time. A. wait B. waiting C. waited