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

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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

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
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

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
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.

C who从句修饰student have been praised表示已经被表扬

B。解析:因被班主任表扬,所以用被动语态;she,第三人称,所以谓语动词用单数形式,所以答案选is praised

d. has been praised

选D