Aesop's fable (高言)about the town mice and the country mice concentrates on the dangers of city-|||-living and rather looks down upon its advantages. Yet advantages there are,for mice and men alike, as-|||-long as those involved are able to grasp them.That,though,requires an ability to respond successfully-|||-to new problems.So a pair of researchers in Germany have looked to see whether urban mice are better at-|||-doing this than rural ones. Their couclusion,just published in Animal Behaviour,is that they are.-|||-Valeria Mazza of the University of Potsdam and Anja Gucnther of the Max Planck Institute for-|||-Evolutionary Biollyy capt 17 striped field mice from farmland and 14 others from various places in-|||-central Berlin. They kept these animals in a laboratory for a year to adapt them,and then challenged-|||-them with various tasks which, if perforned successfully, w yield a reward of food. Tasks included-|||-opening the window panes of a house made of LEGO toy bricks;opening the lid of a Petri dish;and-|||-pulling out a roll of paper jammed inside a clear plastic tube.As a control.all the mice were also given-|||-a naturalistic task that involved digging through a collection of bedding to find a reward.-|||-Both groups seemed equally eager to participate in the tasks,but the urban mice were better at-|||-solving the new ones. They had a 77% success rate, to the rural mice's 52%.When it came to the-|||-control task,though,both were equally good, solving it 85% and 88%respectively.-|||-The researehers' next object of investigation is whether the urhan mice had learned their smarts-|||-before their incarceratio (禁闭),or had inherited them, suggesting they were the product of natural-|||-selection acting on their city living ancestors. This will involve raising mice from the two populations in-|||-identical laboratory coud Dr Mazza and Dr Guenther hope to have the answer later this year.-|||-32.Why is Acsop's fable mentioned?-|||-A.To bring in the topic.-|||-B.To make the beginning unique.-|||-C.To support the researchers' idea.-|||-D.To argue against living in the city.-|||-33.What does the underlined word them" refer to in Paragraph 1?-|||-A.The rural mice. B.Dangers. C.The town mice. D.Advantages.-|||-34.What do the researchers let the mice do to test their new ability?-|||-A.Jam in a roll of paper. B.Play with LEGO toy bricks.-|||-C.Remove the lid of a Petri dish. D.Dig through a pile of bedding for a reward.-|||-35.What conclusion can we draw from the passage?-|||-A.The country mice are as stupid as the urban mice.-|||-B.The urban mice are born smarter than the country mice.-|||-C.Intelligence is determined more by the environment than by parents.-|||-D.The urban mice are better at adapting to new environments than the country mice.