passive voice exercises (1)

6)

Change the following sentences into the passive voice. 

1.

They add bacteria to milk to make yoghurt.

2.

The farmers split the cacao pods open and scoop out the cacao beans.

3.

The machine stretches and twists the wires.

4.

The workers dry the fish in the sun.

5.

Years ago, people churned butter by hand.

6.

The roller mill crushed the grains.

7.

The machine sealed the bottle with a bottle cap.

8.

The robot is fixing the tyres to the body of the car.

9.

The technique turns acetylsalicyclic acid into powder form.

10.

The machine cuts the adhesive bandage into the correct sizes.