用"A lack of resources has become a big problem for this coun

用"A lack of resources has become a big problem for this coun A lack of resources has become a big problem for this countr 英语从句套从句that man is facing a big problem which has become mor 英语翻译A lack of protein is not a problem except for people on 英语翻译Tourism has become a very big business.For spain,Italy a 英语阅读理解.Mobile phone has become a problem for middle schools. Mobile phone has become a problem for middle schools.Some mi 英语翻译Mobile phone has become a problem for middle schools.Som 翻译：Traffic problem has become a main concern of China in rec 帮我看看语法问题.The problem has become a focus of all society ,whic 英语翻译Traffic problem has become a main concern of China in re A generation gap has become a serious problem