如果经济内部收益率( )，表明项目资源配置的经济效益达到了可以被接受的水平。A．等

       要求：1、围绕以上内容进行合理表述； 
                 2、所表述的内容必须包含表中的所有方面； 
                 3、词数80词左右，开头语已给出 (不计入词数)。
       提示词汇： living conditions, narrow, be crowded into, communications (通讯), telegram, thanks to,
rapidly, comfortable, mobile phone, policy
Dear Michael, 
       You want to learn the changes about my hometown. You know, great changes have taken place since 60
years ago. 
       In the past,                                                                                                                                        
                                                                                                                                                               
                                                                                                                                                               
                                                                                                                                            Sincerely, 
                                                                                                                                            Kangkang