It’s impolite angry your parents.
A. Is; to
B. to be ; with
Care; at
D. to be; about
网友回答
A. Is; to
(答案→)B. to be ; with
C. are; at
D. to be; about
解析：to到，向；with带有，伴随；at在一点；about关于。句意：对你的父母发怒很不礼貌。强调句式， It is adj for sb to do sth，做某事对某人来说怎么样。本句中it是形式主语，指代后面不定式内容做形式主语，故选B。