Is this ( ) ruler?A.Your B.Yours C.YouIs this ( ) ruler?A.YourB.YoursC.YouD.You're

This is a ruler(对a ruler提问) ----- -----this? This is a red ruler 用a red ruler 提问 This is a ruler 改为一般疑问句 This is a ruler改为一般疑问句 Is this a ruler.(做否定回答) is,a,this,red,ruler 连成句 this is a ruler 改为复数 this ruler is-----?a:myb:mine this is a ruler.改复数 翻译：and this is a ruler Whis is this?回答A：This is ruler.B：It is a ruler. Is this a ruler.---Yes,this is.（改错） Whose ruler is this? Is this red ruler ( ( ) ruler is this? What's this?This is a ruler.这句有什么错误, This is a long ruler,and that is a short( )A.it B.one C.ruler This is a ruler._____ ruler is blue中____应填写The,还是A?