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Mr.Robinson had to travel somewhere on business，and as he was in a hurry，he decided to go by________．He liked sitting________a window when he was flying，so he got onto the plane and looked for a window seat．He________all of them taken except one．There was a young man________beside it，and Robinson was surprised that he had not taken the one by the window．Anyhow，he went towards it．
When he________it，however，he saw that there was a notice on it，written________large letters，________“This seat is kept for proper balance．Thank you．”Mr.Robinson had never seen such a notice before，but he thought the plane must be carrying something particularly heavy in its room________made it necessary to have the passengers properly balance．So he walked on and found________empty seat，not beside the window______．
Two or three other people______to sit in the window seat next to the young man，but they also read the notice and went on．Then when the plane was nearly______a very beautiful girl______into the plane．The young man，who was watching the passengers coming in，______took the notice______the seat beside him，and by this means succeeded in having a pretty companion during the whole trip．

A．air B．water C．train D．bus

A．on B．nearly C．beside D．far from

A．wanted B．found C．thought D．hoped

A．seating B．seated C．seat D．sat

A．arrived B．sat on C．reached D．left

A．through B．by C．with D．in

A．said B．saying C．spoken D．speaking

A．and B．this C．who D．which

A．another B．other C．the other D．the only

A．to sit B．to be sat C．to sit on D．to be sat in

A．stuck B．tried C．managed D．refused

A．empty B．full C．up D．down

A．reached B．stepped C．entered D．left

A．quickly B．quick C．slowly D．soon

A．onto B．in C．off D．up