单选题 John is the only one of the students who ______ to France.
A. has been B. have been C. had been D. has being

【正确答案】 A
【答案解析】[解析] 定语从句中谓语动词的性数应与先行词的性数一致。解此题关键是要弄清先行词是the only one还是the students。