Make the sentenses passive.
EXAMPLE:They repairing the bridge.
The bridge is being repaired.
1)Has someone repaired your car?
2)They haven't printed the results yet.
3)They won't tell the staff about the problems.
4)They are improving the property.
5)They don't manufacture computers at that factory.
6)They will advertise the new product on TV.
7)They must do the work carefully.

1) Has your car been repaired (by someone)?

2) The results haven't been printed yet.

3) The staff won't be told about the problems.

4) The property is being improved.

5) Computers aren't manufactured at that factory.

6) The new product will be advertised on TV.

7) The work must be done carefully.