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

1. We wrote a test two days ago. - Past Simple.
Мы написали тест два денька вспять.
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 oclock yesterday. - Past Perfect.
Мы теснее 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 теснее полчаса, когда раздался звонок.