1．(2012年高考陕西卷)As many as five courses are provided，and you are free to choose ________ suits you best.
A．whatever B．whichever
C．whenever D．wherever
解析：句意：这里有五门课程供你选择，你可以自由选择任何一门最适合你的。本题考查宾语从句。从句中缺少主语成分，故排除C和D选项。题干中已给出选择的范围as many as five courses are provided，因此选择B项。
答案：B
2．(2012年高考安徽卷) The limits of a person's intelligence，generally speaking，are fixed at birth，but ________ he reaches these limits will depend on his environment.
A．where B．whether
C．that D．why
解析：句意：一般来说，一个人智力上的极限从一出生就决定了，但他是否能到达极限还要取决于他的周边环境。考查名词性从句。whether是否；where哪里；why为什么。根据句意可知选B项。
答案：B
3．(2012年高考浙江卷)Ellen was a painter of birds and of nature，________，for some reason，had withdrawn from all human society.
A．which B．who
C．where D．whom
解析：句意：埃伦是一个专画鸟类和大自然的画家，因为某种原因，她远离了人类社会。此题考查非限制性定语从句，修饰先行词Ellen。因为关系词指人并且在从句中作主语，所以只能用who。
答案：B
