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

---I was trying to carry out the plan, but I failed.---Well, you _____, for we were uncertain it would do ____.

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

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

 – How’s your new class teacher?– We ______ ask for a better one. All my classmates love him so much.