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。