单选题 It is (necessary) that the (customs) (of all) nations (must be respected).
  • A. necessary
  • B. customs
  • C. of all
  • D. must be respected


【正确答案】 D
【答案解析】虚拟语气用法错误，应改为(should)be respected。在让it is necessary/important that... (做…是必要的/重要的)句型中，要用虚拟语气，其构成是should+动词原形，should可省。