He found that complex problems, especially those abstract thinking, were best for picking
He found that complex problems, especially those abstract thinking, were best for picking
发布时间：2020-08-16 09:52:24
He found that plex problems, especially those abstract thinking, were best for picking out bright and dull students. A. involve B. involved C. involving D. being involved
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A. involve B. involved (答案→)C. involving D. being involved 解析：