求2012广州一模语法填空和完型填空的超详细解析?

A farmer once organized a competition between his dog and his rabbit。He dug a hole in one of his biggest fields,and hid a carrot and a bone in it。He wanted to see ___which__ animal would find them first。一位农夫曾为他的狗和兔子组织一场比赛。他在他最大的一块地里挖了洞,并在洞里藏了一个胡萝卜和一块骨头。他想知道哪个动物会先找到它们。\x09The ___cheerful___ (cheer) and optimistic rabbit threw himself into looking for the carrot,___digging___ (dig) here and there,totally convinced that he would find it。But the dog,after sniffing around for a bit,___lay___ (lie) down and began to complain about how difficult it,was to find one bone in such a big field。快乐且乐观的兔子投入到寻找胡萝卜的工作中去,他到处挖,完全有信心他能找到胡萝卜。而那只狗四处嗅了会儿,就躺下了,开始抱怨在这么一大块地里找到一块骨头有多难。\x09The rabbit dug __for___ hours,and with every new hole the dog complained even more about how difficult this was,even for the rabbit。__But___ the rabbit thought that each hole dug was one hole less that needed digging。When there was no place in the whole field __left__ (leave) to dig,the rabbit dug a tunnel right to __where___ the dog had been lying all the time。There he found the carrot and the bone。兔子挖了有几个小时,随着不断挖出的洞,狗愈发的抱怨这有多难,甚至抱怨起兔子。而兔子则认为挖出一个洞,那么需要挖的洞就少一个。当整个地里没有地方可以挖洞时,兔子就挖了个坑道直通狗一直躺着的地方。在那他找到了胡萝卜和骨头。\x09This is how the dog lost the game。He had come to ___the___ right place at the very beginning but failed to find the bone __because__ he only complained and didn't try at all。狗就这样输了这场比赛。一开始他来到了正确的地点,但是没找到骨头,于是他只是抱怨,却根本没有尝试。