当我到达飞机场时,玛丽正要离开。(on the point of)__________________________________________________
I ran across a car crash in Hong Kong, and ________, both sides just politely exchanged the telephone numbers and cards, a surprise to me.
Charlie Chaplin is considered ________ a great contribution to the film industry.
After two hours of hiking, we finally reached _______ Tom thought was the best place to camp.
_________ their final medical check, the astronauts boarded their spacecraft.
_____, and I believe you will realize your dream.