___ are very deligent.

 John thought he was   when the manage asked him for the advice on the new product.

-----Can you come for dinner on Sunday or Saturday?-----I’m afraid _______ day is possible.

There is ______ wrong with my watch. Can you tell me the time?

--What do you think of the price of these computers?--They are at least equal in price to, if not cheaper than, ____at the other companies.