单项选择题
A．the butcher found himself cheated by the smart animal B．the dog was clever enough to write on the paper C．the dog dared not go to tile butcher's any more D．the butcher was told not to give any meat to the dog
A．only the paper with Mrs. Smith's words on it could bring it meat B．the butcher would give the meat to it whenever he saw it C．a piece of paper could bring it half a pound of meat D．Mrs. Smith would pay for the meat it got from the butcher
A．Newton figured out the orbit of the comet. B．Halley figured out the orbit of the comet first. C．Newton gave Halley some help. D．Halley died before 1758.