18×23=12；
18×123，
=18×53，
=30．
故答案为：12；30．
By the time of last term, we all the lessons. [ ]
A. finished
B. had finished
C. finish
“包装种类”栏应填（）。
A．冷轧不锈钢带
B．木箱
C．裸装
D．可以不填
