A few thousand years ago, people lived about 30 years. Now many people live over 75 years. Obviously, we have already ________ our lives to an amazing degree.
得分/总分

A.

attained
B.

stretched
C.

extended
2.00/2.00
D.

enriched
出自:兰州交通大学-土木工程-大学英语3

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