Li Ming's family are talking about visiting the Expo in Shanhai.Li Ming try and want to interesting his family go there by plane.
But they are still wondering what they are going to take by."Obviously,it's more expensive if we take by plane than by train.But we can arrive there at the first time of the Expo Opening Ceremony by plane,it's faster than by train." Li Ming insisted.
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Finally,the family agree with each other and drive to airport happily.