Завершите предложения с Past Simple глаголов в скобках My grandfather ________ (collect) stamps when be was a…

Завершите предложения с Past Simple глаголов в скобках My grandfather ________ (collect) stamps when be was a boy.He _____ (begin) to learn manyinteresting facts about history.And he _________ (know) many interesting stories about album.Later when he __________ (travel) he always ____________ (bring) many stamps for his collecting.