1. (2023高二上·天津市期中)  完形填空

Mr.Robinson had to travel somewhere on business,and as he was in a hurry,he decided to go by 1 .He liked sitting2  a window when he was flying,so he got onto the plane,he looked for a window seat.He 3  all of them taken except one.There was a young man sitting beside it,and Robinson was4 that he had not taken the one by the window.Anyhow,he went towards it.

When he5 it,however,he saw that there was a notice on it,written6 large letters,7 "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 room8 made it necessary to have the passengers probably balance.So he walked on and found9 empty seat,not beside the window10 .Two or three other people11 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 nearly12 ,a very beautiful girl13  into the plane.The young man,who was watching the passengers coming in,14  took the notice15  the seat beside him,and by this means,he succeeded in having a pretty companion during the whole trip.