题目内容：

what is it? yes,it is. it is my cat. this is mary. he is my brother.

优质解答

这是什么?是的,它是的 这是我的猫 这是Mary 他是我兄弟 应该选第二个

追问：

选择 what is it? A.yes,it is. B.it is my cat. C.this is mary. D.he is my brother.