单选题 She undertakes to verify the true source of the rumor.
  • A. tries
  • B. decides
  • C. promises
  • D. refuses


【正确答案】 C
【答案解析】[解析] undertake：保证、许诺，和promise(答应)词义相近；try：尝试；decide：决定；refuse：拒绝。