the book is so fancily written that it____(值得看）once again.(worth)
应该是is worth reading.
worth的用法是be worth doing.worth是没有用be done的形式表被动的用法的.只能用动词ing形式表示被动.
而看书、读书应该用read book.所以答案应该是is worth reading
1L的答案绝对错误,看书是不能用watching的.