2. 外语
  3. Many ways have been found______small and simple machine to process large and complicated machine parts.

Many ways have been found______small and simple machine to process large and complicated machine parts.

admin2016-02-04  59
问题 Many ways have been found______small and simple machine to process large and complicated machine parts.
选项 A、by using
B、to use
C、using
D、used
答案B
解析 to use…，不定式短语作way的定语，只是因为定语太长，故将谓语前移，使句子避免头重脚轻；by using表示方式，作状语用；using为动名词，不能作way的定语，way要求不定式作定语；used无论从语法结构上还是从意义上都讲不通。
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