一个正方体容器的棱长是4cm，装满水后倒入另一个深6cm的圆锥形容器中，刚好倒满，这个圆锥形容器的底面积是（ ） cm2。
32
By the time he arrives in Tianjing, we ____ here for two days.
A．have stayed
B．have been staying
C．stay
D．will have stayed
