如图1所示是标有“2.5V”字样的小灯泡L的电阻随它两端电压变化的图像。将小灯泡L和电阻R接入图2所示的电路中，电源电压为7.5V。当开关S闭合时，小灯泡恰能正常发光,则小灯泡正常发光时，电阻R消耗的功率为____________。

—I phoned you at 5:00 yesterday afternoon, but nobody answered me.

—Sorry. I          the flowers in the garden at that time.

A．was watering

B．am watering

C．water

D．will water