—I didn't go to see the doctor yesterday.—But you ________.

 I’d rather ________ than _________

Sometimes the boy is a bad-tempered child, but he ____ be quite lovely when he wishes．

It has been announced that all the candidates______ remain in their seats until all the papers have been collected.

－ Whose is this blue bike? －It ________ be Mary’s. Her bike is black and white.