what is dog doing 还是what is a dog doing,那个对 还有is dog running across the street,还是is a dog,这两个句子到底用不用冠词a 啥时候用冠词各位大仙求解

what is dog doing 还是what is a dog doing,那个对 还有is dog running across the street,还是is a dog,这两个句子到底用不用冠词a 啥时候用冠词各位大仙求解 Look What is the dog doing 在什么情况下Is可以改为does?RT~ Example：what are they doing?The dog is swimming.(dog/swim)照样子,写句子.Example：what are they doing?The dog is swimming.(dog/swim)1.(bear/play chess)_________________.2.(cat/fish)____________________.3.(monkey/take pictures)________________ What is the dog doing?It()some meat.(eat)(填动词适当形式） what about the dog 可改为 what about the she?或what about the bag?what is the dog doing in the garden 可改为 what is the she doing in the garden What f____ the dog is! what dog is it today what is she doing? What is he doing? What is he doing what is Green doing what is it doing what is it doing What is he doing? what is amy doing? what is you doing? What do you think he is doing还是Whai do you think is he doing? 用what和how或what a 填空______important work she is doing!_______lovely dog it is!______useful the book is!________unusual man he is!