《红星照耀中国》是美国著名记者____的不朽名著。这是一部文笔优美的纪实性很强的____作品。作者真实记录了自1936年6月至10月在____进行实地采访的所见所闻，向全世界真实报道了中国和中国工农红军以及许多红军领袖、红军将领的情况。____和周恩来是作者笔下最具代表性的人物形象。

某油箱容量为60 L的汽车，加满汽油后行驶了100 km时，油箱中的汽油大约消耗了$\frac{1}{5}$，如果加满汽油后汽车行驶的路程为x km，油箱中剩油量为y L，则y与x之间的函数解析式和自变量取值范围分别是（　　）

    Bob and his family like eating fish very much. He often buys some fish in the shop and takes them home for dinner. His wife (妻子) often asks her friends to their home to have lunch and eat fish. One day, Bob buys some fish home and goes to his office to work. His wife sees the fish and thinks, “Good! I can ask my friends to come for lunch.”

    When Bob comes home from work in the evening, he can't find his fish. His wife says, “ Oh, It's your cat. Your cat eats it.” And she gives Bob some bread for dinner. The husband is very angry(生气的). He takes the cat and his wife to the shop near (附近) their home to weigh  the cat. Then he asks his wife, “You see, my fish is one kilo, and this cat is one kilo, too. My fish is here. Then where is my cat?”

根据短文内容，选择最佳答案。