Question

Write sentences in the Passive
1) Our car / service / a mechanic / at the moment.
2)A man / shoot / an air gun / outside the petrol station last night.
3) Gunpower / invent / the Chinese.

Answer 1

Our car is being serviced by a mechanic at the moment.
A mam was shot by an air gun outside the petrol station last night.
Gunpowder was invented by the Chinese.

Answer 2

1) Our car is being serviced by  a mechanic at the moment. 
2) A man was shot with an air gun outside the petrol station last night.
3) Gunpower was invented by the Chinese.