填空题 The armor, infantry and other military forces were held up by the enemy counter attack, thus caused the delay in the advance.
  • A.other military forces
  • B.were held up
  • C.the enemy counter attack
  • D.caused


  • 1、
【正确答案】 1、D应改为causing。    
【答案解析】[解析] D项应为现在分词形式，作状语表示结果。