present simple - не мог найти.
past simple - But it was the Romans who developed the first public toilets and enormous public baths.
present perfect - Infection and disease haven't been eliminated entirely in our hospitals yet.
future - Furthermore, medical organisations will be challenged in the future by new infections and diseases.
present continuous - Although hygiene in developing countries is being improved all the time.
present simple - не мог найти.
past simple - But it was the Romans who developed the first public toilets and enormous public baths.
present perfect - Infection and disease haven't been eliminated entirely in our hospitals yet.
future - Furthermore, medical organisations will be challenged in the future by new infections and diseases.
present continuous - Although hygiene in developing countries is being improved all the time.