用括号内所给动词的适当形式填空，必要时可加助动词或情态动词。
Mr Jones liked to be comfortable, so every time he took a train, he used to put a bag on the seat next to him
and pretend that it belonged to a friend who had gone 1______ (buy) something at the station.
One day, Mr Jones did this when the train 2______ (be) very crowded. When nearly all the seats 3______
(take), an old man got on (上) the train. Looking at the bag, he asked, "Is this seat taken?"
"Yes." said Mr Jones, "It belongs to my friend who has gone to buy some cigarettes. He 4______ (come)
back soon." Pretending to worry about his friend, he looked out of the window.
"All right," said the old man, "I'll just sit here until your friend 5______ (return), if you don't mind."Mr
Jones couldn't say anything. Just then the train began 6______ (move) out of the station.
"Well," said the old man, "What a pity (遗憾)! Your friend 7______ (miss) the train already, but his bag is
still here." Before Mr Jones could say anything, the old man took the bag and threw it out of the window.