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We(test)thenewmachinewhentheothers(worWe(test)thenewmachinewhentheothers(work)inthefields.填部分,

题目详情
We _(test)the new machine when the others _(wor
We _(test)the new machine when the others _(work)in the fields.填_部分,
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答案和解析
tested
were working