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Unit One Topic Three Section CA:Whats this in English?B:Its a/an.A:Whats that in English?B:Its a/an.A:Is this a/an?B:Yes,.A:Is that a/an?B:No,it isnt.Its a/an.A:What are these?B:They are.oranges.A:What are those?B:They are.books.A:Are these apples?B:.Yes,they are.A:Are those erasers?B:No,they arent.Theyre telephones.a boxtwo boxesa cakethree cakesa schoolbagfour schoolbagsa busa busseven buses写出下列名词的复数形式写出下列名词的复数形式1.book2.cake3.apple4.pencil5.orange6.blackboard7.box8.busbookscakesapplespencilsorangesblackboardsboxesbuses一般情况在名词后一般情况在名词后直接加直接加“s”以以“s,x”结尾加结尾加“es”