Question

rewrite these sentences using the PASSIVE VOICE..1) My maid makes a cake every day.2) Marconi invented the radio.3) We speak Portuguese in Brazil.4) My brother is doing the homework now.5) The secretary will send the fax tomorrow.6)The mayor has built many squares.7)They were using the computer when I arrived.8)My father is going to sell our house.9)The kids had eaten all the pie when their mother arrived home.10) my brother did his homework this morning

Answer 1

1) everyday a cake is made by my maid
2) the radio was invented by Marconi
3) in Brazil portuguese is spoked by us 
4) now the homework is being done by my brother
5) tomorrow the fax will be sent by the secretary
6) many squares  were built by the mayor
7) when I arrived the computer was being used by them
8) our house is going to be sold by my father
9) when their mother arrived home all the pie was eaten by the kids
10) my brother's homework was made by him this morning 

espero ajudar!!