As we know,language is one of the significant means for mankind to ________thoughts and feelings. ( )
A:drive
B:convey
C:deliver
D:transport
0.78×101=____
1.25×0.4×8×2.5=____
64×4.5+36×4.5=____
13÷0.4÷2.5=____
7.28 +3.2÷0.4=____
0.75×18 ÷0.15=____