Students  ______ remain in their seats until all the exam papers have been collected.

—Will you read me a story, Mummy? —OK. You _____ have one if you go to bed as soon as possible.

Close the door of fear behind you, and you ____ the door of faith open before you.

If you ________ yesterday，you ________ with your mother now.

 He _____ without saying good-bye to them, for he always has good manners.