The importance a national day and how it is celebrated are very different from country to

问题补充：

The importance a national day and how it is celebrated are very different from country to country.

A. connected to

B. given to

C. meaning to

D. attached to

答案：

A. connected to

B. given to

C. meaning to

(答案→)D. attached to

解析： 考查短语attach importance to--- “认为有重要性”