问题
选择题
My aunt has worked in a clinic ____2008.
A．after
B．before
C．till
D．since
答案
答案：D
根据前面用现在完成时态，所以这里用since。
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My aunt has worked in a clinic ____2008.
A．after
B．before
C．till
D．since
答案：D
根据前面用现在完成时态，所以这里用since。