补全短文
astonishingly available embarrassed A. readily 【T7】______by pushing a button B. that people are easily 【T8】______ C. human beings are 【T9】______ lazy There are two reasons for this sad decline: One, 【T10】______. Put a lift in a building, and people would rather take it than climb even two flights of steps. Similarly, invent a machine that sings, and people would rather let the machine sing than sing themselves. The other reason is 【T11】______. When there is a famous, talented musician 【T12】______, which amateur violinist or pianist would want to try to entertain family or family or friends by himself?