She's a well-known doctor,but she ___ as a cleaner at the hosptial for five years.A has workedB workedC had workedD works

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She's a well-known doctor,but she ___ as a cleaner at the hosptial for five years.A has workedB workedC had workedD works

She's a well-known doctor,but she ___ as a cleaner at the hosptial for five years.A has workedB workedC had workedD works
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 hosptial for five years.A has workedB workedC had workedD works
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.

She's a well-known doctor,but she ___ as a cleaner at the hosptial for five years.A has workedB workedC had workedD works
选 C had worked句意是：“她是一个知名的医生，但是她曾经在医院里做过五年的清洁工作”。【过去完成时】had worked是一个【相对时...

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She's a well-known doctor,but she ___ as a cleaner at the hosptial for five years.A has workedB workedC had workedD works
选 C had worked句意是：“她是一个知名的医生，但是她曾经在医院里做过五年的清洁工作”。【过去完成时】had worked是一个【相对时态】，相对她【当医生之前】，即【过去的过去】曾经
做过五年清洁工，所以，用【过去完成时】。

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答案选择B，用一般过去时表示曾今做过清洁工，但现在是医生。

B.表示陈述过去事实

B，表示陈述过去事实

C吧！这里用had表示过去的过去了，意思为“她在医院当了五年的清洁工”说明是在过去当的，故选C

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