单选题 ______ CEO Ken Chung sold his majority stake in the company's stock, it was trading for a record-high of $4.14 a share.
  • (A) On the other hand
  • (B) At the time
  • (C) In addition that
  • (D) However much


【正确答案】 B
【答案解析】[语法] 时间连词at the time(那时候)