Use of English PRO

(0) WHEN you (1) ............ of a robot, what do you see? A machine that looks a bit like you and me? The reality is that robots can come in many (2) ............ shapes and sizes. They don't need to look like humans. In fact, most don't. What a robot looks like (3) ............ on its purpose. Flying robots might look like helicopters, or have wings like insects or birds. Cleaning robots often look like little vacuums. Robots that are meant to interact with people often have a face, eyes, or a mouth (4) ............ like we do! (5) ............ they look like us or not, most robots have three essential ingredients that make them a robot: sensors, actuators, and programs. Together, these ingredients are (6) ............ make a robot different from other electronics and gadgets you might have around your house, like your computer, your washing machine, or your toaster. Helping at home, (7) ............ which other robots are being designed, is not as much of a priority as the exploration of space, or improving our efficiency at work. Whatever their purpose, each robot will need a carefully thought (8) ............ set of sensors, actuators, and programs.