一块体积是200cm³的金属块，质量为540g，把它切掉1/3后，余下部分金属的密度是[ ]

A．2.7×10³kg/m³

B．1.8g／cm³

C．1.8 kg／m³

D．4.05×10³g/m³

Mum gives me a dog for my holiday. _______ name is Lucky.       [ ]

A.It's

B.Its

C.It

D.Hers