单选题 They are {{U}}endeavoring{{/U}} to reform the present rules.
  • A. trying
  • B. working
  • C. doing
  • D. making
【正确答案】 A
【答案解析】[解析] 考查动词。划线词endeavor意为“尽力，努力”，与try同义，所以答案为A。