Unit One Topic Three Section C1.A: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.2.A:What are these?B:They are.oranges.3.A:What are those?B:They are.books.4.A:Are these apples?B:.Yes,they are.5.A:Are those erasers?B:No,they arent.Theyre telephones.6.a boxtwo boxes7.a cakethree cakes8.a schoolbagfour schoolbags9.a busa busseven buses10.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”11.12.