I would appreciate _________ if you could come to my birthday party.
The two top students in Mr. Green’s class competed _____ each other for the highest marks.
It is no use ____ with that mean storekeeper, for he won’t cut down the price.
There is no doubt ____ John will come by bus.
The reason ____he was late was ____he had taken a wrong bus.
The 29th Olympic Games ____ in Beijing in 2008.