Put the verbs in brackets into the past simple. Which verbs are irregular?

Конечно, давай выполним это задание. Нам нужно поставить глаголы в скобках в форму прошедшего простого времени (Past Simple) и определить, какие из них являются неправильными (irregular). 1. Sir Alexander Fleming was (be) a famous scientist. 2. He studied (study) medicine at St Mary's Hospital. 3. After World War I, he returned (return) to St Mary's. 4. and worked (work) there as a professor. 5. In 1915, he married (marry) Sarah Marion McElroy 6. and they had (have) a son. 7. He discovered (discover) penicillin in 1928 8. and received (receive) the Nobel Prize for Medicine in 1945. 9. His wife died (die) in 1949. 10. His second wife was (be) a Greek doctor. 11. Fleming died (die) on 11th March, 1955. 12. They buried (bury) him in St Paul's Cathedral. Неправильные глаголы: was/were (be), had (have), died (die).