单选题 The police have conducted the exhaustive investigation for this murdering.
  • A. important
  • B. tired
  • C. thorough
  • D. careful


【正确答案】 C
【答案解析】本题是派生词的考查。Exhaust+ive=exhaustive耗尽的=彻底的；important重要的；tired累的，疲倦的；thorough彻底的，完全的；careful小心的。