this,she,he,ti,I造句英语达人速度来啊!答:This is a book.Is this a book?yes, it is.No, it isn't.She/He is a student.Is she/ he a student?Yes, she/ he is.No, she/ he isn't.It is a cat.Is it a cat?Yes, it is.No, it isn't.I am a student.Are you a student?Yes, I am.No, I am not....