Change the sentences Active to Passive, and Passive to Active

1. Did they sell many cars last year? -
2. The picture has been sold for $3,000 -
3. Bell didn't invent the television? -
4. Two pictures were stolen from the musem -
5. Sis anybody invite Helga to the party?

Change the senteces into Passive
1. They are building a new shopping center in our town
2. Someone was recording our conversation
3. They changed the hour of the departure
4. I don't clean my car very often

were many cars sold last year? 2. somebody has sold the picture for 3000. 3.the television wasn't invented by Bell?4.somebody stole 2 pictures. 5. was Helga invited by anybody? 1 a new shopping center is being builtin our town. 2. our conversation was being recorded by someone. 3. the hour of departure was changed.4. my car is not cleaned very often