What sentences? There are no sentences. <span />
"ese libro" is "that book"
"este libro" is "this book"
"aquel libro" is also "that book"
"este libro" is the correct answer because it is stating that the book is near the person talking about that book.
Answer:
a la
Explanation:
Clase is a feminine noun, so you would use la. Since it's singular you would not conjugate for multiple, making the full sentence: Vas a la clase de espanol ahora