A

        Mr Smith is 84 years old now. He has seen many changes in his hometown.

        He knows that things are 31.                 now. But he never 32.                 the old days.  He likes to talk about them. He often talks about his favorite 33.                , the robins(知更鸟).  'When I was a boy, there were not these houses here. There were wide fields and tall trees. Every 34.                 the robins would come. Thousands of them would 35.                 up to the north from the south. They 36.                 the winter in the 37.                . Some would build their nests(巢) in the trees near our houses. Then people started to cut down trees in order to 38.                 more houses and grow crops. The robins stopped coming. They couldn't build their nests near our houses 39.                 there were no trees.'