A．All the devices and parts are put in the basement.
B．All the devices and parts are put into a single box.
C．Cellular phone and Internet are part of this system.

A. an official
B. a marketing researcher
C. a health products exporter
D. an agent for textiles
E. a trader for livestock and poultry
F. a clothing maker
G. a company’s receptionist
H. a board member