this is my classroom.the waii are white这个句子 哪里错了

this is my classroom.the waii are white这个句子 哪里错了 This is my a classroom.哪里错了? Look!This is my classroom.The wall is White.The floor is gre this is a jacket,the jacket is a white哪里错了 there may are some students playing in the classroom.这个句子哪里错 where is your white shoes 这个句子哪里出错了 The man is my brother with the white bag.哪里错了 This is a alarm clock 这个句子哪里错了?.. This is an useful tool.这个句子哪里错了? “Are there some children in the classroom?"哪里错了? This is the classroom 把这个句子中的“这个”改成“那个” what is this?This is my photo.哪里错了?