问题补充:
. Intelligence is to some extent one is born with
A. that
B. of which
C. something
D. which
答案:
A. that
B. of which
(答案→)C. something
D. which
解析:to some extent 是插入语,可忽略。则该句是Intelligence isone is born with. One后面缺少先行词,故用代词something作先行词,省略关系代词that。选C。