第一课 A puma at large 课后习题： structure结构 5、People said____the puma. A.to have seen B.to see C.they saw D.they had seen 答案为D，a选项为什么不行呢。 12、A private collector is a man who collects___ A.for his own benifit B.on his own C.in private D.unknown to the public 答案是a.为什么b不行呢 西方国家不是为了保护野生动物，可以 自己养宠物吗？

很显然，朋友，你在语法上欠缺火候 5．其实是省略了said后的that, they had seen 是从句 12．这是一个判断句我们不能随意曲解它的意思collect for his own benifit 为了自身利益，for是不能变为其他介词的 You must master more stuctures Thank you

  people is said to have seen the puma应该这样说,但意思也变了

  s say to 是对谁说.如对Jim说say to Jim on one's own汉语是独立地，自愿地