问题
单项选择题
He has ______ a very odd set of people. I hope they won't have a bad influence on him.
A．got mixed up with
B．got involved in
C．lined up with
D．come up with
答案
参考答案：A
解析：get mixed up with“与……混在一起”；get involved in“卷入……”；line up with…“成为……同盟者；与……联合”；come up with“赶上；提出”。