单选题 The board of directors have already discussed the subject ______ in the previous meetings and they will handle it in all its aspects.
  • A. in place
  • B. at length
  • C. on end
  • D. off and on
【正确答案】 B
【答案解析】[解析] 四个选项的意思分别是：in place准备妥当；at length详细地；on end连续地，不断地；off and on时断时续地。句意是，在前几次会议上，董事会已经详细地讨论了这个话题，并将全方位地进行处理。所以正确答案是B选项。