单选题 Because of the complexity of the modern machine, most offices require secretaries ______.
  • A. to have specified training
  • B. specified in traing
  • C. to train secifiedly
  • D. training specified


【正确答案】 A
【答案解析】[试题分析] 此题考查不定式的用法。
[详细解答] 动词require后面跟“宾语+to be”，不定式作宾语补足语。因此A为正确选项。