2. 外语
  3. _____ring in the wood of a tree trunk indicates one year of growth.

_____ring in the wood of a tree trunk indicates one year of growth.

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问题 _____ring in the wood of a tree trunk indicates one year of growth.
选项 A、Some
B、Each
C、All
D、Several
答案B
解析 The singular noun ring needs a singular expression of quantity: Each.
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