将x，y的值代入原方程组得到关于m，n的方程组4+m=32n+1=3，
解得m=-1，n=1．
---We could invite John and Barbara to the Friday night party.
--- Yes, _______? I’ll give them a call right now.
A．what for
B．why not
C．why
D．what
327/64×8的值是( )。
A．40
B．321/8
C．327/8
D．39/8
