单选题 By the end of this month, we surely ______ a satisfactory solution to the problem.
  • A) have found
  • B) will be finding
  • C) are finding
  • D) will have found


【正确答案】 D
【答案解析】[分析] 这个月末是还没到来的将来时间，描述一个在将来时间将会完成的动作，其时态当然应该用将来完成时，比如：The conference will have lasted a full week by the time it ends. 到结束时，会议就开了整整一周。