Michael and Derek are good friends, but they like to pull each other's leg sometimes. One day during the holidays they decided to go to London together. They went to the 1 and bought their tickets. When the train came in, Michael 2 it first and, 3 it, dropped his 4 on the platform (站台) as he got into the carriage. Derek, who was 5 saw the ticket 6 and quickly picked it up. Without a word to his friend, he put it 7 .

　　 8 they had been in the train a little while, they 9 the ticket inspector coming down the corridor (走廊), shouting“Ticket, please!” Michael looked for his and 10 couldn't find it.

　　“Oh dear, I can't find 11 ticket, Derek.” he said.

　　“Have 12 look, Michael; it must be 13 .” said Derek. “No, I can't find it anywhere. What shall I do?”

　　“Perhaps you had better 14 under the seat; then the inspector won't know you are here.” So Michael 15 under the seat as fast as he could and lay perfectly 16 . Presently the door opened, and 17 the inspector. “Tickets, please.” he said.

　　Derek handed him 18 , and said, “This is mine. 19 belongs to my friend, 20 prefers to travel under the seat.”

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