解析：Wampum, beads used as (a form) of e_考试试题_托福

【单选题】Wampum, beads used as (a form) of exchange by some NativeAmericans, was made of (bits of. seashells cut, (drill), and strung into belts.

A、a form
B、by
C、bits of
D、drill

网考网参考答案：C
网考网解析：
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