21．Sandra works in a big factory．She's worker．A．a B．the C．some ——青夏教育精英家教网——

摘要：21．Sandra works in a big factory．She's worker．A．a B．the C．some D．／

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Sandra works in a big factory．She's worker．

A．a B．the C．some D．／

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Sandra works in a big factory. She's_________worker.

A．a

B．the

C．some

D．/

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