— Does he play ______ our National Team(国家队)?
— Yes, and his team is going to play _______ Japanese team next week.
A:with; for
B:for; against
C:against; with
D:with; against
若方程(a﹣3)x|a|﹣2﹣7=0是一个一元一次方程,则a等于 ____