题目内容
根据句意及首字母或汉语提示完成句子
1. These students (自愿做) to help to care for the old people during last summer holidays.
1. volunteered
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题目内容
根据句意及首字母或汉语提示完成句子
1. These students (自愿做) to help to care for the old people during last summer holidays.
1. volunteered