单选题 I bought this computer two weeks ago, but it isn't working as it ______.
  • [A] can
  • [B] would
  • [C] need
  • [D] should


【正确答案】 D
【答案解析】[精析] 后半句为省略句，完整的句子应是“but it isn't working as it should work”。故选D。