新概念第三册英第一课问题.The search proved difficult,for the puma was often observed at one place in the morning and at another place...difficult是修饰proved的吗? 为什么不是The search proved is difficult,这样的吗?没有BE动

新概念第三册的第一课:where must the puma have come from?第三册的第一课where must the puma have come from? 关于新概念第三册第一课有一句话一个had用法问题新概念第三册第一课后面有一句“but where had it come from”我想问一下里面的had是翻译成什么啊?可以换成was么? with what does the writer compare the Gouffre Berger,是新概念英语第三册第42课的问题, 新概念第三册英第一课问题.The search proved difficult,for the puma was often observed at one place in the morning and at another place...difficult是修饰proved的吗? 为什么不是The search proved is difficult,这样的吗?没有BE动 关于新概念英语第三册第一课的问题新概念3 第一课,有一句'a large cat' only five yards away from her.这里only five yards away from her.属于什么成分?另外away可不可以去掉? 新概念第三册英第一课问题..and experts confirmed that a puma will not attack a human being unless it is cornered.这里的being看不懂为什么用在这里?起什么作用? 新概念英语第三册习题的问题第一课中1、What particular evidence persuaded the experts that a puma had been seen in the village?为什么要选A.The puma had not attack the woman.而不选B.The woman had described the animal she had se 关于新概念第三册第一课的问题?有一句是 As no pumas had been reported missing from any zoo in the country,this one must have been in the possession of a private collector.对于肯定推测 have been 是死也不能改的吗? has 可 新概念第三册第九课中问题one of the things that fascinates us most about.中fascinates是否应改为fascinate 新概念英语第三册第三单元第45课The power of the press的复述（用英文） 新概念英语第二册第三课主要内容 求 新概念第三册 15课课文内容 新概念英语第三册一共多少课? 急需新概念第三册 42课课文 the block of flats 是单数还是复数 新概念第三册58课 背过新概念第三册的进,英语口语新概念第三册都背下来是不是跟外国人对话就没有问题了? 新概念三册第一课课文 新概念2册第一课课文原文