题干
My uncle ______ the club in 2014. He ______the club for over 3 years.
A：joined; has been a member of
B：joined; has joined
C：has joined; has joined
D：has joined; has been in
答案(点此获取答案解析）
A
，且
、
都是全集
的子集，则右图韦恩图中阴影部分表示的集合为（ ）
