Я дам 20 очков. Пожалуйста помогите!!!!!!!!!!!!!!!!!!!!!!

Ex:7 Write the sentences in the passive.

a) In the past people used salt as payment for work. In the past salt ...
b) In France people eat 700 million snails every year.
In France 700 million snails ....
c) People have produced chocolate for 2,000 years.
Chocolate .....
d) Half the world's population eats rice.
Rice .....
e) People are throwing away 88,000 kilos of food right now.
88.000 kilos of food .....