Many a student failed in the biology exam，and Tom is the only one of them who decided t

Many a student failed in the biology exam，and Tom is the only one of them who decided to give up the course.
A. have；has　
B. have；have
C. has；have　
D. has；has

A. have；has　(答案→)B. have；haveC. has；have　D. has；has解析： 主谓一致。 Many a +单数名词 谓语动词用单数，不止一个。Who 引导定语从句，看先行词，如果先行词是one of+ 名数复数，则定语从句谓语动词用复数形式。；如果先行词是the only one of+名词复数，定从的谓语动词则用单数形式。本句话意思为，不止一个学生生物考试不及格，Tom 是唯一一个决定放弃这门课的学生。考点 主谓一致

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