英语短文填空Bob and David are good friends.but they like to joke o

英语短文填空
Bob and David are good friends.but they like to joke on each other sometimes.One day they went to London for their holidays.They went to the _______ and bought their tickets.When the train arrived,Bob got on the train first,but he dropped his _______ on the platform without knowing it.David was behind him and quickly _______ it up.Without saying a word to his friend,he put it in his ________.
After they had been in the _______ for a little while,they saw the conductor coming along,shouting,"Ticket,please!"Bob ______ for his and of course he couldn'tfind it.
"On,dear,I can't ______ my ticket,David."he said.
"Have another look,Bob;it must be ______."said David.
"NO,I can't find it anywhere.What shall I do?"
"Perhaps you'd better hide under the_______ so that the conductor won't see you."
So Bob crawled under the seat and Iay there quietly.Soon the conductor stood in front of David."Ticket,please."he said.
David handed him ______ tickets and said,"This is mine.The other is my friend's.He prefers to travel under the seat."