Mr Black likes fish very much. He often buys some fish in the shop and takes them home for supper.
布莱克先生非常喜欢鱼。他经常在商店买一些鱼带回家做晚饭。His wife, Mrs Black often asks her friends to their home to have lunch and eat fish.他的妻子，布莱克太太经常叫朋友来家里吃午餐，然后会把鱼吃掉。
One day, when Mr Black comes home in the evening, he cannot find his fish. And Mrs Black says their cat has eaten the fish. Mr Black is very angry. 布莱克太太说是他们的猫吃了鱼。布莱克先生非常生气。He takes the cat to the shop near their house to weigh the cat. He says, “You see, my fish is one kilo, and this cat is one kilo, too. My fish is here. Then where is my cat?”他带着猫去家附近的商店称体重。他说:“你看，我的鱼一公斤，这只猫也一公斤。我的鱼在这里。那我的猫呢?”