He is so addicted to smoking that ________ seems to be no chance of talking him into quitting.

When you have any questions，tum to Jane or Lucy or _________ your group．

 I asked two people to help me start my car , but         of them knew what to do .

Annoyed by the salesman's bad manner，John chose ________of the two computers on sale and left.

Jenny isn’t doing ________ now. Maybe she can help sweep the floor.