This is a ruler.______ is black.应填什么

This is a ruler._____ ruler is blue中____应填写The,还是A? This is a ruler(对a ruler提问) ----- -----this? _____ a ruler ? yes,____. A.Is this, it is B.Is that,it‘s C.this is, it's 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 This is her ruler.(改为否定句和一般疑问句) ___ ___ ___ her ruler.____ ____ her ruler? Is this ruler ____ 1、them 2、jack 3、yours 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 (