单选题 Gadfly was too much exhausted to wake easily when once asleep.
  • A. worn out
  • B.--dreary
  • C. reluctant
  • D. chary


【正确答案】 A
【答案解析】四个选项中A项worn out“疲乏”与exhausted“疲劳”是同义词，所以A为正确答案。其他三项的含义分别是：“枯燥的”、“不情愿的”、“谨慎的”。