Study shows that walking fast at your old age is a __

试题详情及答案解析

Study shows that walking fast at your old age is a ___ that you will live a long life.

A．sign

B．mark

C．symbol

D．signal

答案：A

试题分析：考查名词词义辨析。A标志，迹象，征兆；B痕迹；C症状；D信号；句意：研究显示年老时快步走是你长寿的征兆。根据句意说明A项与上下文搭配正确。
考点：考查名词词义辨析