Question

          you read it , you can' t imagine how moving the story is .
A. Unless         B. Because          C. Although

Answer 1

A.

Unless 意为：“除非”，because 意为：“因为”，although意为“尽管，虽然”。本句意思是“除非你读过这个故事，不然你无法想象它有多感人。”故A