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Hewasn'ttheonlyoneofthestudents()theTOEFL.A.whohadpassedB.whohaspassed为什么?

题目详情
He wasn't the only one of the students ( )the TOEFL.A.who had passed B.who has passed
为什么?
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答案和解析
答案是A,这道题考查的是定语(关系)从句的知识.关系从句关键要看先行词.如果这道题中的NOT去掉,He was the only one of the students...时,先行词是实际上是He,这时答案就选B.加上not后,先行词则变成了students复数,答案不能选B,只能选A