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She's a well-known doctor,but she ___ as a cleaner at the ho

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She's a well-known doctor,but she ___ as a cleaner at the hosptial for five years.
A has worked
B worked
C had worked
D works
She's a well-known doctor,but she ___ as a cleaner at the ho
B,不要被for five years迷惑就选现在完成时,因为题目中很明确她现在是医生,因此在医院做清洁工的状态并没有延续到现在,不能用现完,而work是延续性动词,后面接for=时间段是完全可以的.