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She ______ her mother’s work since she was admitted into hos

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She ______ her mother’s work since she was admitted into hospital.
A.hasbeendoing
B.isdoing
C.hasdone
D.did
She ______ her mother’s work since she was admitted into hospital.
A.has been doing
B.isdoing
C.hasdone
D.did
选A
翻译:自从她来到医院后,她一直从事她妈妈的工作
表示过去持续进行的动作,有对现在有影响
用现在完成进行