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Определите функцию слов с окончанием -ed,переведите .

а)
We obtained a good crop of potatoes last year.
б)
Grain crops cultivated in our region are wheat,
oats and barley.
в)
These cows are milked three times a day.
г)
Raw materials are used by our industry for
different purposes.
д)
He cleaned the pigsty yesterday.
е)
They worked on this farm two years ago.
ё)
The products supplied by farm animals are meat,
milk and eggs.
ж)
The amount of milk produced by a cow varies with
the quantity and quality of her feed.
з)
Lambs are fattened on this farm.
и)
We have already used all the root crops.
й)
The eggs are being collected now.
к)
The milk yield obtained by our farm per cow was
high enough last year.
л)
Cows provided with nutritious feed and good care
produce high milk yields.

Спасибо ..