将下列句子变成一般疑问句，并作简要的肯定回答和否定回答。This is Gina.疑问句：Is this Gina？肯定句：This is Gina.否定句：This isn’t Gina.That is his brother.疑问句：Is that his brother？肯定句：That is his brother.否定句：That isn’t his brother.He is my good friend.疑问句：Is he my good friend?肯定句：He is my good friend.否定句：He isn’t my good friend.These are...
