题目内容
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
【答案】
A
【解析】略
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题目内容
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
A
【解析】略