题目内容
【题目】She _____ as a nurse in a hospital since three years ago.
A. works B. worked C. has worked D. will work
【答案】C
【解析】句意：她从三年前就在一家医院当护士。since three years ago表示的是截止到目前为止的时间段，用于现在完成时态的句子中，故答案为C。
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题目内容
【题目】She _____ as a nurse in a hospital since three years ago.
A. works B. worked C. has worked D. will work
【答案】C
【解析】句意：她从三年前就在一家医院当护士。since three years ago表示的是截止到目前为止的时间段，用于现在完成时态的句子中，故答案为C。