What is it还是What is this

What is it还是What is this what is this?-It is. What is this?It is This is a book.对book 提问时what is it 对,还是what is this? What is this?是用this isF还是this is a F还是it is F it is an ice cream.(用what提问）回答what is this?还是what is it? what is this 回答 与what is that 回答用It's 还是this is and that is哪 What is This?it is a______(书) What is this?it is orange. what is this?It is eraser病句 how it is还是what it is What is this 是This is a pen.还是.It is a pen?为什么?