[解析]
1:pig's hair 细节理解题;结合题意和提示可知答案是pig's hair.
2:clever 细节理解题.根据第三段 In fact.They have a good memory and can tell different shapes apart.In France.With their good sense of smell.(事实上.他们记忆力很好.许猪找到松露,能在短时间内找到松露,可知猪是很聪明的.
4:cool themselves .根据第4段 On hot days.This keeps insects away from them as well.在炎热的日子里.这可以让昆虫远离它们.结合题意和提示可知答案是 cool themselves.
4:lucky.推理判断题,people will think he or she has good luck(如果有人有一张圆脸;be动词面填形容词做表语;luck的形容词是 lucky(幸运的).
6:people believe pigs stand for wealth 细节理解题.根据此句 On the other hand.Piggy banks are a good example of this,人们相信猪代表财富.句意可知this指代"人们相信猪代表财富"这句话.