01 A Ever `wonder how dogs can walk barefoot ['bε?fut] in the snow↗? Now a Japa`nese scientist may have the answer—an︶inside central heating system. The secret lies in how dogs `circulate ['s?:kjuleit] their blood /to prevent cold `surfaces from chilling the rest ︶of their bodies↘. The system uses warm blood to heat the cold blood /before `returning it to the dog’s heart/ and `central circu`lation. Dogs exchange `heat at the `end︶of their legs. Arterial blood flows [fl?uz] to the `end︶of their `legs /and then heats︶up venous blood. In other words↘, they have a `heat exchange system in their `feet ↘. B 三问 How old is your son? What major does your son want to take in the future? How do you get along with your son? 五答 24. To find a good job. Playing the guitar. Being a music producer. Like friends. C I was lonely when I went to a junior high school, but a gift a boy gave me occasionally changed my character. It was his smile. One day the boy, who was a stranger to me then, came into our classroom. When he passed me, he smiled at me. This smile brought me happiness and warmth. From then on I began to get close to others and made friends with them. The boy with the smile is one of my best friends now. 02 A Although they are a natural phenomenon [f?'n?m?n?n]↗, dust storms have been occurring `more often recently ['ri:sntli]↘. It︶is a fact that unreasonable herding of animals /and exploitation of grasslands/are res`ponsible for the ma`jority of dust storms. This means that dust storms are largely a result of human actions; in other words↘, they are con`trollable. We seem to think, however↘, that economic [,i:k?'n?mik] development and preservation of the environ...
