I, READING + Choose answers A, B, C, D that match the paragraph: The world's largest animals (1) ______________ to go on feet because it allowed them to develop stronger legs and carry a great deal of body weight. Scientists have (2) _________________ the reason that many large mammals from rhinos, hippos to giraffes tend to move on their feet. This is because walking with toes and (3) _______________ can allow these animals to become larger at the same time. A study of 880 mammals found that many sized animals grew (4) _______________ at the same time they evolved from walking on flat feet to walking with feet. Dr Manabu Sakamoto, a (5) _______________ scientist at the University of Reading (UK), said that mammals grew very (6) _________________ when they began to walk like "ballerinas". The tiptoe and the legs that they developed to lead to the large mammals we know today. Besides, we also cannot see lizards eat a ton of grass. Dinosaurs are another group in (7) _________________ history that had a way of moving with tiptoe and reaching sizes of up to many tons. 1) A. evolved B. evolvement C. development D. evolution 2) A. discover B. detect C. discovered D. detected 3) A. hoof B. horseshoe C. hooves D. claw 4) A. fast B. rapidly C. quicks D. promptly 5) A. biologically B. Ecological C. biology D. biological 6) A. speedily B. quickly C. fastly D. swiftly 7) A. evolutionary B. evolution C. developmental D. evolvement