Preheat oven to 400.  Cut a thin slice off the bottom of each pear to help keep them standing upright in a baking dish.  Pour fruit juice into the pan.  Add cinnamon stick and cloves.  Roast the pears, basting every 15 minutes, until tender, brown and puckered.  Remove the pears and place on a serving plate.  Drizzle the liquid from the bottom of the baking pan on top of the pears