Переведите предложение We write a test в Past simple,past continues,past perfect,past perfect continues

1. We wrote a test two days ago. - Past Simple. Мы написали тест два дня назад. 2. We were writing a test when the headmistress came into the classroom. - Past Continuous. Мы писали тест, когда директриса вошла в класс. 3. We had already written a test by 12 o\'clock yesterday. - Past Perfect. Мы уже написали тест к 12 часам вчера. 4. We had been writing a test for half an hour already when the bell rang. - Past Perfect Continuous. Мы писали тест уже полчаса, когда раздался звонок.