Betty is the only one of the students who______to represent the group.A、have bee

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问题 Betty is the only one of the students who______to represent the group.

选项 A、have been chosen
B、has been chosen
C、have chosen
D、has chosen

答案 B

解析 主谓一致题。若关系代词在定语从句中作主语,定语从句谓语动词的单复数形式应与先行词保持一致:当先行词为one of+复数名词时,定语从句所修饰的是复数名词,所以定语从句的谓语动词用复数形式;当先行词为the only one of+复数名词时,定语从句所修饰的是the only one,所以定语从句的谓语动词用单数形式。原句的先行词是the only one of the students,所以who引导的定语从句的谓语动词用单数形式,故应选[B],同时排除选项[A]和[C];定语从句的谓语动词choose是及物动词,其后必须跟宾语,而原句choose之后没有宾语,由此可知choose应用被动语态,故排除选项[D]。
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