九年级人教新目标Unit6Whenwasitinvented?Period6SectionB1a-1eHowdotheytaste?crispysaltyTheytastecrispy.Theytastesalty.crispyTheytast...
Unit6Whenwasitinvented?Period2SectionA2a-----2celectricity/ilektrisəti/n.电；电能Inmoderncitieswecan’tlivehappilywithoutelectr...
