Sam likes fish very much.He often buys fish i n the shop and takes it home. But when his wi fe sees the fish, she says to herself, "Good! No w I can ask my friends to have lunch, and we c an eat this fish. They like fish very much." So when Sam comes home in the evening, the fish is not there and his wife always says, "Oh, your cat ate it." And she gives Sam some brea d for his supper. Sam gets very angry. He take s the cat and his wife to the shop near his hou se and weighs the cat. Then he turns to his wif e and says, "My fish weighs one kilo(公斤).This cat weighs one, too.My cat is here, you see. Then where's my fish?"