My son won the first prize in the speech conest last week (改为被动语态)
问题描述：
My son won the first prize in the speech conest last week (改为被动语态)
答
The first prize in the speech conest was given to my son last week.
上周我儿子获得了演讲比赛的第一名.
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答
The first prize in the speech contest last week was won by my son.
答
The first prize in the speech conest was given to my son last week.
答
My son was awarded the first prize in the speech conest last week
答
答案：The first prize was won by my son in the speech conest last week.
翻译：上星期我儿子在演讲比赛中夺得了第一名.