单选题 He was the only one of them who ______ passed CET-4.
A. has B. have C. is D. are

【正确答案】 A
【答案解析】“one of+关系从句”结构中，one的前面加了定冠词，关系从句的先行词则成了the one，动词要用单数。此句为完成时，用has。