.Mr. White has been invited to the celebration _________ tomorrow afternoon.

.—What do you think made Jenny so happy?—_________ a ticket to the opening ceremony of the 29th Olympic Games.

Was it in the waiting room ______ only allows mothers-to-be to enter that you lost your wallet? 

—Must I turn off the gas after cooking?—Of course. You can never be ____ careful with that.

_______ was at the end of the meeting that Mr. Smith made the decision .