完形填空。 Tom had a beer in a bar and he was asked to pay $6.50 by the boss. 'But I paid you just now. Don't you __ 1 __ ?' Tom replied. 'OK,' said the boss, 'If you said you paid, you did. ' Then Tom __ 2 __ the bar excitedly. When he met his friend, Jim, he told Jim his __ 3 __ about what had just happened to him. 'The boss of the bar doesn't have a good memory. He __ 4 __ remember whether his customers have paid or not. Why not go to the bar and have a __ 5 __ beer?' Tom suggested. To Jim, it sounded like a __ 6 __ idea. He rushed into the bar,ordered two beers and later played the same trick (伎俩) on the boss. Jim paid __ 7 __ for his beer. Soon, John heard Tom and Jim's stories. He didn't want to miss the chance to try his __ 8 __. So John hurried into the bar. When he was drinking, the boss said, 'A funny thing happened here tonight. Two men were drinking beer. Neither paid, __ 8 __ both said that they had. The next guy who tries that trick will be __ 9 __out of the window. ' 'Don't tell me about your problem,' John said. 'Just give me my change and I'll be on my way home. (     ) 1. A. understand (     ) 2. A. left (     ) 3. A. book (     ) 4. A. mustn't (     ) 5. A. free (     ) 6. A. strange (     ) 7. A. everything (     ) 8. A. truth (     ) 9. A. if (     ) 10. A. paid B. remember B. set B. boss B. must B. cheap B. boring B. nothing B. result B. so B. broken C. expect C. repaired C. wine C. can't C. fresh C. good C. anything C. luck C. or C. thrown D. suppose D. began D. story D. can D. favourite D. stupid D. something D. experiment D. but D. looked