—I _____ thank you enough for what you have done for me.
—You’re welcome.

He insisted that he _______ nothing wrong and that he _______ now.

It was required by the headmaster that all the students        at the meeting.

Jackie，you 　　　　 hang all your clothes in the room like this！

—Peter looked tired and a little absent-minded in class．
—He _____ too late．

------ How’s your tour around the North Lake? Is it beautiful?
------ It _______ be, but it is now heavily polluted.

Mr. Blake __________my letter, otherwise he would have replied by now.

The headmaster suggested that a good preparation ________ ahead of time.

________ for the free ticket, I would not have gone to the theatre so often.

–I didn’t invite him to the party but he came anyway and got completely drunk.
--__________he hadn’t come! The party could have been a success.