Поставьте глаголы в Past Simple или Past Perfect:
He (to travel) to many countries and (to know) a lot of interesting facts about them. 7. Yesterday I (to find) the book I (to look for) so long. 8. When we (to enter) the house there (to be) nobody in, but we (to have) a feeling that somebody (to be) there because the windows (to be) open. 9. When he (to meet) the lady, he (to understand) that she (not to be) so young as he (to expect). 10. By the time Caesar (to approach) the shores of Britain, the season (to be) nearly over.