Research findings have shown that about 20 percent of people only 10 percent can be as “early birds

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编辑：chaxungu时间：2026-04-27 03:13:26分类：高中英语题库

【题目】Research findings have shown that about 20 percent of people only 10 percent can be (分类) as “early birds”.
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【答案】classified
【解析】classified 考查动词。此处根据前文的be可知，此处为被动语态，应该用过去分词。故填classified。