单选题 He is the only person who can ______ in this case, because the other witnesses were killed mysteriously.
  • A. testify
  • B. charge
  • C. accuse
  • D. rectify
【正确答案】 A
【答案解析】[解析] 本题中testify作证，证明，证实；charge(with)指控，收费，冲锋；accuse(of)控告，谴责；rectify调整，纠正，矫正。because为因果关系线索词，所填的动词被because后的内容做解释，A正确。句意是：他是唯一的能够在这件案子中作证的人，因为其他证人都被神秘地杀害了。