A study shows that walking fast in your old age is a that you will live a long life.A. si

发布时间：2020-08-16 19:10:04

A study shows that walking fast in your old age is a      that you will live a long life.
A. sign
B. mark
C. symbol
D. signal

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(答案→)A. sign
B. mark
C. symbol
D. signal
解析：此题为词义辨析题。sign迹象，征兆；mark标记，记号；symbol象征，符号；signal信号。根据题意“老了走的快是长寿的征兆”，因此选A。
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