There is a big dog _____to a fence outside the house.为什么不选C?A.tyingB.tiedC.to tieDties

This is a big dog改成感叹句 there might be a big dog ____ there.A sit B sat C sitting 选C 为什么 sitting前不加is this is a big dog.对big提问,用How this is a big dog.对big提问,用How 2.There is a big dog _______to a fence outside the house.为什么不能选A?求详解2.There is a big dog ___A____to a fence outside the house.　　A.tying B.tied C.to tie D .ties There is a big dog _____to a fence outside the house.为什么不选C?A.tyingB.tiedC.to tieDties There is a big house. There is a big shopping ( ) There is a big shopping ( ) There is a big school there's a big dog in front of the There is a big bookshop_ _ _ side of the street在街道的对面有一个大书店 什么the table there is a dog There is a dog near the dor There_ _ _ _(is,are)is a dog and a cat.是不是is? this is a big dog的意思快 将 it is a big dog 改成一般疑问句 this is a dog._eyes are big and black.