What is the best way to change this sentence from active voice to passive voice? The students in the language lab wear earphones to hear the computer better.

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.

Chapters 3–5 while reading, think about… author’s purpose/point of view symbolism communication between characters —ethan frome

Which form does a verb take when the subject receives the action? passive active imperative indicative