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These workers were made             for more than 10 hours a day in the past.

A. to work
B. working
C. worked
D. work
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科目:初中英语 来源:期末题 题型:单选题

These workers were made             for more than 10 hours a day in the past.
[     ]
A. to work
B. working
C. worked
D. work

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