The alligator(鳄鱼) was Mother' s fault. She told me to buy something (36). Mother, as usual, blames me. She says that I' ve got more (37) than brains. That's not my little brother's (38) . I'm envious of my younger brother, Bobby, because (39) likes him. Last Christmas I gave him a pair of socks. Bobby was too stupid to understand the insult（侮辱）. (40) getting mad, he said to me, 'They' re great and just what I (41) . ' Mother had understood, though. So (42) year, on Friday, the week before Bobby' s eighth birthday, she said, 'Why can't you (43) your little brother? Only a mean person buys a cheap pair of white cotton socks. ' Then she added, 'I got (44) whenhe was watching a (45) show on TV. He likes animals. They' ve got turtles（龟） on sale. You can buy him(46) as a birthday gift. ' Feeling annoyed but (47) , I promised. On the morning of (48) , I saw the newspaper on the kitchen table. In big (49) , it announced that turtles were on sale (50) fifty cents. Then I saw the small print: BABY ALLIGATORS ON SALE.