he is the only one of the student who____a winner of scholarship for three years.
a.is b.has been
这里为什么不能是is呢?
人气：305 ℃ 时间：2019-11-14 10:29:27
解答
he is the only one of the student
who____a winner of scholarship for three years.只看从句.时间已经有三年了,已经是发生了三年的事情,用现在完成时
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