[解析]
(1)C.细节理解题.由第一段中"The people were poor.However,they were not unhappy.人们很穷,但他们并不不快乐"可知,他们虽清贫但还算幸福.A项原文未提及;B项是后文所述之事;D项与第一段中的信息恰恰相反.故选C.
(2)A.细节理解题.由第三段首句"This seemed like money for nothing.There were millions of frogs in the fields around,and they were no use to the villagers.All they had to do was catch them.Agreement was reached,and the children were sent into the fields to catch frogs.这似乎是白手起家,周围的田里有上百万只青蛙,村民对它们毫无用处,他们所要做的就是抓住它们,达成了协议,孩子们被送到田里去抓青蛙."可知,村民们认为青蛙是无用却能让他们快速发财致富的东西.故选A.
(3)B.细节理解题.由倒数第二段最后一句"They were damaging the crops and spreading diseases.他们正在破坏庄稼并传播疾病."可知,由于昆虫增加,导致农作物损失,疾病蔓延,从而引起儿童患病,体质虚弱.故选B.
(4)C.推理判断题.最后一段"Now,the people are still poor.But in the evenings they sit in the village square and listen to sounds of insects and frogs.These sounds of the night now have a much deeper meaning.现在,人们还很穷,但是到了晚上,他们坐在乡村广场上,听虫蛙的叫声,这些夜晚的叫声现在有了更深的含义."可知聆听夜晚的昆虫叫与蛙鸣声﹣﹣这些声音赋予人们更深刻的含义,那就是:人与自然的和谐相处.故选C.