单选题 The Constitution's vague nature has given it the flexibility to be adapted when circumstances change.
  • A. imprecise
  • B. concise
  • C. unpolished
  • D. elementary


【正确答案】 A
【答案解析】vague：模糊的、含糊的，和imprecise(不确切的、不明确的)意思相近；concise：简明扼要的；unpolished：未经修饰的；elementary：基本的、初级的。