题干

— That’s the third time he’s won the award in this field.
— Yes. He ______ his maximum potential in the past decade.
A.exploredB.is exploringC.has been exploringD.has explored
上一题 下一题 0.64难度 单项选择 更新时间:2015-06-23 08:11:47

答案(点此获取答案解析)