3×8×125=3×（8×125）应用了乘法______律．
3×8×125=3×（8×125）应用了乘法（结合）律；
故答案为：结合．
I must say he reads very well，and I shouldn’t be surprised if he__________acting for a living one day.
A．had taken up
B．takes up
C．have taken up
D．would have taken up
回族是西域人以（）为纽带建立起来的民族。
A、基督教
B、伊斯兰教
C、佛教
D、犹太教
