题目内容：

She is the only one of the students who___by the headmaster.
She is the only one of the students who___by the headmaster.
A.are praised.B.is praised.C.have been praised.D.has been praised

优质解答

选d.首先,根据前句是一般现在时,可以判断后句是现在完成时,因为她被表扬一定会对后来产生影响,第二,在定语从句中,如果先行词被the only修饰,那么从句中谓语动词用单数形式.