Nowadays some mothers still play（ ）big part in the lives of their grown-up children.
A、
/
B、
a
C、
the
D、
an
【正确答案】：B
【题目解析】：
play a (big) part in...：在...中扮演着（重要）的角色，固定搭配，选B。句意：如今，一些母亲在成年子女的生活中仍然扮演着重要角色。
Nowadays some mothers still play（ ）big part in the lives of their grown-up children.
Nowadays some mothers still play（ ）big part in the lives of their grown-up children.
/
a
the
an
play a (big) part in...：在...中扮演着（重要）的角色，固定搭配，选B。句意：如今，一些母亲在成年子女的生活中仍然扮演着重要角色。