This is an old computer______works much slower.where that which who or whose这个空填什么?

This is my an old ruler.改错.各位哥哥姐姐, This is my an old ruler.有一处错误请指出 about,is,book,man,this,old,an.连词成句 This is an 8-year-old boy.That girl is 7 years old . this is an old man. he is 80 years old. 合成一句 this is an old man .he is 80 years old合成一句.this is —— ——man This is an old hotel（改为感叹句） _______ _________ this hotel is! 变复数 That isn't a jacket下面句子如何变复数请帮忙This is an eraserIs it a yellow ruler Yes,it isWhat's this in English?It's am orangeWhat's color is the quilt?It's whiteIt's my blue ballIs this his computer?no it isn't,It's your compu This is my an old ruler.哪里错了 this my old ruler只能从这几个里找 The main character of this game is( )girl.A. a 11-year-old B.an 11-year-old my,an,is,family,this,old,of,photo连词成句 this is a true story of an old man and his sensidly monkey. this is an old ____ of my family which was taken last year about,is,book,man,this,old,an.连词成句急1分钟内 This is an old hotel（改为感叹句）_________ _________oid hotel This is an old book.Could I have____?a newnewnew onea new one It is terrible to find an old man living___in this place.A:aloneB:alongC:again This is （ ）old computer game.填什么?是a 还是 an