题目内容：

Is that city____you have ever been to?
A.the one B.where C,which D,what

优质解答

选A,先根据句意改成陈述句,为that city is you have ,发现是定语从句,少了先行词,用the one 代替,the one后面省略了which 或 that,就是一个定语从句啦~