The iron ball falls to the groud faster than ----------- ---

The iron ball falls to the groud faster than ----------- --- The iron ball is heavier than the wooden one.同义改句 the tortoise faster than you! nothing in the world travels faster than go to the ball than's the way the ball bounces What is known to us that the light travels faster than sound The iron ball doesn’t fall down as ________as the balloon.(g 划线提问(the fish)swim faster than the duck the boy swims faster than the girl.改为否定句 The boy runs faster than the girl.改为一般疑问句 The population of the ----countries is growing faster than t