John, look at the time. ______ you play the piano at such a late hour ?
The question of drug-taking is bound to(一定要) ______ at the next conference.
_______ and you will make rapid progress.
Its Ann’s birthday tomorrow. Will you _____me in buying a present for her?
The little boy insisted that he______ nothing wrong and that he ______.
I think we should ________all the toys to the local children hospital.