мы беспокоились за такой жесткий те

мы беспокоились за такой жесткий тест, но напрасно - фильтр отлично справился со своей работой.

Результаты (английский) 1:

We were worried for such a hard test, but in vain-filter perfectly coped with their work.

Результаты (английский) 2:

We were worried about a tough test, but to no avail - the filter perfectly coped with their work.

Результаты (английский) 3:

We worry for such a hard test, but in vain - the filter is perfectly coped brilliantly with its work.