单选题 In reorganizing the curriculum in the late 1800's, Elizabeth Mead laid the foundation ______ the modern college rests.
[A] is which
[B] on which
[C] which is on
[D] on it

【正确答案】 B

【答案解析】[名师精解] 空格前后都有主谓结构，显然空格处需要从句引导词，A、D可排除，从句已有主语college，C也可排除，只有选项B，其中词组rest on中的介词放在了关系代词 which的前面。
[解题秘籍] 注意：rest on的on不能省略，要与代替它后面成分的which连用。