I am proud（of）my son‘s friend,but his father was angry(about）what his son said
be proud of 以.自豪
angry about 关于.发怒选项有：A.be,onB.for being.of C.of being,withC.of being,withbe proud of being your friend 成为你的朋友我很自豪 be your friend，be在of后面用分词形式beingangrywith对。。生气