This work ________ three hours ago．


  1. A.
    does
  2. B.
    was done
  3. C.
    did
  4. D.
    has been done
B
首先注意整句的語態(tài)應(yīng)為被動語態(tài)，再注意整句的時態(tài)是一般過去時，所以正確答案應(yīng)為一般過去時的被動語態(tài)．
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