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题目内容双击单词支持查询和收藏哦～
Over the years, some researchers and educators have (i)____________ the argument for hands-on learning of science, (ii)____________ that a more straightforward approach—known as direct instruction—has the potential to help students learn science more effectively.
- Blank(i)
- challenged
- evaluated
- refined
- Blank(ii)
- conceding
- maintaining
- pretending
challenged , maintaining 显示答案
以上解析由 考满分老师提供。
