After work I went to the box office to buy the tickets for Kungfu Panda 2, only to be told there was ______ left.
Once upon a time, a (n)__________ famous scientist said that life was not easy for any of us but first of all we should believe in ourselves.
He let me repeat his instructions __________ sure that I understood what was __________ after he went away.
David couldn't tell __________ from far away whether the green traffic light meant going straight or turning left.
-Are you a volunteer now?-No, but I __________. I worked for the City Sports Meeting last year.
He used to __________cards, but now he is used to __________ a walk after supper.