Eachoneofusissuppose的精选

问题详情：完形填空Eachoneofusissupposedtosavetheenvironment.Hundredsofyearsago,lifewas  1  than  2  today.Peopledidn’tusemodernmachines,andthere  3  modernmachines,  4 .Lifetoday  5 ...