This worksheet deals with the invention of very useful devices for people.
The fisrt exercise is a conversation with a grandmother who tells us how important the washing machine was in her life. Then the ws revises the use of passive. The third exercise is a timeline about the evolution of the washing machines to make students write sentences using the passive voice.
Key, script and audio file link provided on:
Here you are the link to a worksheet that deals with the same topic but as a reading and wrting exercise: