this is什么leg只能填a或am

this is什么leg只能填a或am This is ___quilt.___ quilt is red.空白处填什么用a an或不填 -----is this your ruler? 选择题----- 填什么?A.i am sorry b.helloC.excuse me D.how are you This is a ruler.______ is black.应填什么 This is a bag.( )bag is yelloy.填什么为什么? Look,this is a photo ? a park. ?填什么 this is the company____we will reach 填什么?this is the company____we will reach.填where which that 或省略? This is the leg.的意思是? he is a jack-leg This English girl is good.填a,an或不填 This is( )Fin 26 letters（填an、a、the或不填） This is a map.That is ()English book.填a或an? Is this a( )orange的括号里该填什么 this is a picuter _____his family.填什么? strip意思This is a beautiful______.空格里填什么? This is a family of ( )括号填什么 this is a science building w____many labs 填什么? this is a science building w____many labs 填什么?