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  3. Woodsmen, hunters and trackers learned to follow and read the【21】left, behind【22】animals, men, nature and time. Their ability to

Woodsmen, hunters and trackers learned to follow and read the【21】left, behind【22】animals, men, nature and time. Their ability to

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问题     Woodsmen, hunters and trackers learned to follow and read the【21】left, behind【22】animals, men, nature and time. Their ability to survive【23】on their skills in【24】these signs. Soon they reasoned that if signs left behind accidentally had【25】, they could leave signs deliberately(故意) for their【26】future use or for the benefit of【27】following them.【28】trail signs and symbols【29】and soon became【30】standardized. A hunter in a forest backed(砍) pieces of back(树皮) off some of the trees in his path so that he could find his way back【31】so that others could【32】him. Woodsmen often made a cut on【33】of the tree so that the trail could be seen from【34】direction and from either side of the tree. Trackers chipped from one side only, and then trails were【35】to follow.  
选项 A、either
B、neither
C、each
D、one
答案A
解析 本题属词选题。下文中的“either side of the tree”已提示答案。neither(两者都不)，each(其中之一)，one(一个)均不符。
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