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We ________ the thief in the act of breaking into the house.


  1. A.
    discovered
  2. B.
    were discovered
  3. C.
    invented
  4. D.
    were invented
A
答案选“A”。“我们发现那贼闯进房子。”主语we与动词discover是主动关系,先排除选项B、D;“invent”是“发明”意义不符题意,淘汰“D”。
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