同学们在测量油的密度时，只有天平，没有量筒．他们取一个质量是20g的空瓶，测得装满水后总质量为60g，装满油后总质量为52g，则油的密度（　　）

A．1.3×10³Kg/m³

B．0.8×10³Kg/m³

C．1.0×10³Kg/m³

D．条件不足，无法求出油的密度

________ thousands of people outside; it was too noisy.[ ]

A. There seemed to be

B. There seemed to have

C. It seemed to be

D. It seemed to have