单选题 The former supervisor took pleasure in writing a letter of recommendation for Mr. Chung since he ______ took care of all the assignments.
  • (A) specifically
  • (B) undeservedly
  • (C) suitably
  • (D) voluntarily


【正确答案】 D
【答案解析】为什么很乐意写推荐信呢?因为Mr.Chung“自愿地”处理事务。