问题补充：
—Have you ever been to the Qinghai Lake, Jim?
—Yes. That’s the most fantastic place I’ve ever visited.
A. who
B. which
C. where
D. that
答案：
A. who
B. which
C. where
(答案→)D. that
解析：句意：那是我曾经参观过的最奇妙的地方。定语从句用来充当句中定语的成分，被修饰的名词叫先行词，连接主从句的是关系词。关系词分：1关系代词：who , whom , whose , which , that。2关系副词：where,when why 等。一般的who 用于指代人的先行词，which 用来指代物的先行词，that既可指认又可指物。关系代词在从句中作主语、宾语。但在下列情况下一般只用that而不用which ：
先行词本身是all , everything , something , nothing , anything等不定代词时， 先行词已有序数词或形容词的最高级或the last, the only等作定语时，先行词既有人又有物时。故选D。
