Copernicus’s theory is now the basis all our ideas of the universe are built.A. to whichB

问题补充：

Copernicus’s theory is now the basis all our ideas of the universe are built.

A. to which

B. on which

C. for which

D. by which

答案：

A. to which

(答案→)B. on which

C. for which

D. by which

解析：考察定语从句中介词的选择。本题考察的是定语从句中介词的使用，第一从句中介词的来源有三种：第一：定语从句中的固定搭配；第二：先行词的固定搭配；第三：根据定语从句的意思。本题basis（基础）与介词on连用。句意：哥白尼的理论是我们现在关于宇宙的理论的构建基础。