(1)原式=12×3-5=36-5=6-5=1;
(2)原式=33-33+23=1433.
You must ______ your homework on time . [ ]
A. to finish
B. finishing
C. finish
D. finishes
单个柜员为客户办理个人结算、个人储蓄、单位结算、贷款、代收代付业务。( )