There are a lot of books in the bookcase.（对划线部分提问）

There are a lot of books in the bookcase.（对划线部分提问）
There are a lot of books in the bookcase.（对划线部分提问）

There are a lot of books in the bookcase.（对划线部分提问）
没看到划线,如果对a lot of books 提问是,What's in thebookcase?或者How Many books are in the bookcase?

划线部分是a lot of 吗？

亲，哪里画线了？