Tom’s mother kept telling him that he should work harder, but ______ didn’t help.

The number 911 is _____ special number, _______, I think, that will be remembered by the Americans forever.

I would appreciate         if you could look after my pet while I am away.

 ---Were your parents at home last night? ---No. _______ of us went to my uncle’s birthday party.

Everyone______that computer is helpful.