单选题 It will be necessary ______ all assembly line workers to have a basic understanding of statistics in quality control.
  • A. to
  • B. on
  • C. for
  • D. from
【正确答案】 C
【答案解析】[解析] 语汇：介词 1．本题考查介词的选择。 2．不定式(to have)的形式主语(all assembly line workers)前需要加介词for，因此C为正确选项。