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问题: Tom isthe only one of the boys who __away from schoolyesterday.

请问各位大虾此空该填was还是were,理由是什么?十万火急,thank you!

解答:

Tom isthe only one of the boys who __away from schoolyesterday.
应选were. who 指代the boys 。
如果让who 指代Tom,句子改成:Tom who was away from school yesterday is the only one of the boys. 这时候选was。