问题补充：
His grandfather was among the first to settle in is now a famous holiday center.
A. what
B. which
C. where
D. that
答案：
(答案→)A. what
B. which
C. where
D. that
解析：考查名词性从句引导词的区别。空格前有介词in，后面就是宾语从句，且后面这一句子缺主语，A 什么东西=the thing that /the things that,从is来看，what=the thing that; B 哪个，与介词连用时应该是引导定语从句，但前面没有先行词故排除；C项为副词，不能做后面句子的主语且where=介词+地点也排除；故A 正确。
