生活中遇到的基本电路是______电路和______电路．如节日小彩灯是______联的，家里的电灯和冰箱是______联的，家里电冰箱中的灯泡和压缩机是______．节日的夜晚，装点 * * 等高大建筑物上的成千只灯泡是______联的．

Internet shopping will really _____ when people believe that it is safe.

A．take off

B．take up

C．get off

D．get up