I was about to go to bed _____ one of my old classmates made a call to me.
He is a difficult person, for he ___________________ about everything.
He ________ his aunt the day he arrives in Beijing.
Although knocked down by a car, he managed to _______ to his feet.
They are now holding talks in a friendly _________ in the meeting room.
Bill Gates is so _____ that he has given away most of his money to the poor.