My dog is__much bigger than your dog.(much/big) yes,my dog is_one of the smallest_dogs.Your dog is__much heavier_and_stronger than mine,too.(much/heavy/strong)Planet F4 was ____________________________________......Planet D2 is____________________________________________________........-July 20th,went to new home on planet D2-old home on planet F4Planet F4-much hotter and brighter-one of the dirtiest planets in space-much busier and noisierPlanet D2-not brighter/much cooler-bigger-quieter-one of the cleanest planets in space敬请指点