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 sitting __2__ 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 __4__ beside it, and Robinson was surprised that he had not taken the one by the window. Anyhow, he went towards it.
