Complete each sentence with the correct ending, A-G, below. Write the correct letter, A-G, in boxes 37-40 on your answer sheet.

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问题 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.
Until recently, delayed growth in humans until adolescence was felt to be due to

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答案D

解析 The beginning of the second paragraph mentions the explanation for the delay of physical growth, held until recently, that the survival of young humans is dependent on others. ’Until recently, the dominant explanation was that physical growth is delayed by our need to grow large brains and to learn all the behaviour patterns associated with humanity ... humans cannot easily fend for themselves ... That way your parents and other members of the social group are motivated to continue looking after you.’ Distraction B: The fact that human beings walk on two legs(’upright locomotion’)is mentioned later as a new theory; E: ’the cold, harsh environment’ is mentioned later but is given as a possible reason for reaching adulthood quickly(i.e. the opposite of ’delayed growth’).
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