问题
选择题
— That’s the third time he’s won the award in this field.
— Yes. He ______ his maximum potential in the past decade.
A．explored
B．is exploring
C．has been exploring
D．has explored
答案
答案：C
考查时态。从语意知“过去十年来他一直都在发掘他最大的潜能”，另外，从“in the past decade"可知应该用现在完成时，同时此处强调十年来他一直保有的状态”，所以选择用现在完成进行时，故选C。