It was rude you to stare at the foreigner when he passed by just now.A. ofB. forC. withD.

问题补充：

It was rude you to stare at the foreigner when he passed by just now.

A. of

B. for

C. with

D. to

答案：

(答案→)A. of

B. for

C. with

D. to

解析：考查介词：这是it做形式主语的句型：It is +adj+for/of+sb +to do sth,如果形容词是指人，用of，如果形容词指不定式的动作，用介词for，浙江沿海的形容词是rude是指人，所以介词是of，句意：你刚刚看着外国人走过的时候真是不礼貌。选A。