According to news reports, personal of guns in the USA causes a lot of trouble.
A. wealth
B. possession
C. matter
D. problem
网友回答
A. wealth
(答案→)B. possession
C. matter
D. problem
解析：考察名词。Wealth 财富 possession拥有，所有，财产 matter物质，事件 problem问题。
句意为，根据新闻报道，美国私人枪支的所有导致很多麻烦。