判断先行词
问题描述：
判断先行词
John is the only one of the students who has been to France.中哪个是先行词,为什么,
答
the only one 是先行词,因为其后的定语从句中用了单数形式.如句子改成John is one of the students who have been to France.即其先行词为students.