--- That’s the third time he’s won the award in this field.
--- Yes. He ______ his maximum potential in the past decade.


  1. A.
    explored
  2. B.
    is exploring
  3. C.
    has been exploring
  4. D.
    has explored
C
考查時態(tài)。從語意知“過去十年來他一直都在發(fā)掘他最大的潛能”，另外，從“in the past decade"可知應該用現(xiàn)在完成時，同時此處強調(diào)十年來他一直保有的狀態(tài)”，所以選擇用現(xiàn)在完成進行時，故選C。
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