单项选择题
A．lived a partly human life
B．was a branch of Homo sapiens
C．used tools before Homo sapiens arrived
D．had a brain as large as a common chimp’s
单项选择题 The man showed the boy （）he should play the piano.
单项选择题 Without the help of people from every corner of the world, people in Wenchuan County, Sichuan Province（）recovered very quickly from the May twelfth Earthquake.
单项选择题 A completely new situation will （） when the examination system comes into existence.