3. Add one word in each sentence to make a correct passive sentence. Then write which tense each sentence is in. 1)The radio was invented by Marconi.. past simple
2 )Many new gadgets been invented in the 21st century
3)Many jobs be done by robots in 2025
4) Velcro, penicillin and the microwave oven invented by accident
5) Millions of dollars spent on video games every year
6) Football is by millions of people on TV each weekend
7) The novel The Fault in Our Stars written by John Green in 2011