His mother _____ (be) a doctor for more than ten years.

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Hismother_____(be)adoctorformorethantenyears.Hismother_____(be)adoctorformorethantenyears.Hismother_

His mother _____ (be) a doctor for more than ten years.
His mother _____ (be) a doctor for more than ten years.

His mother _____ (be) a doctor for more than ten years.
has been
for more than ten years.超过10年
他的妈妈当医生已经十年多了.
用现在完成时