单选题 Complete each sentence with the correct ending, A-G, below.
Write the correct letter, A-G, in boxes 37-40 on your answer sheet.
A. inconsistencies between height, skeleton and dental evidence.
B. the fact that human beings walk on two legs.
C. the way teeth grew.
D. a need to be dependent on others for survival.
E. difficult climatic conditions.
F. increased quantities of food.
G. the existence of much larger brains than previously.
填空题 Until recently, delayed growth in humans until adolescence was felt to be due to
填空题 In her research, Margaret Clegg discovered
填空题 Steven Leigh thought the existence of adolescence is connected to
填空题 Research on Neanderthals suggests that they had short lives because of