1) I had been walking for about half an hour when at last I (to see)____ a little house near the river. I (to understand) ____ at once that it (to be)____ the house about which Ann (to tell)_____ me a few weeks before. I (to knock)_____ at the door and (to ask)_____ to come in by the voice from inside. A woman (to sit)____ at the window with a book in her hands.

2) Sarah and I are old friends. We (to know)____ each other since we (to be)___ in primary school.

3) Close the window, please. It (to rain)_____.

had been walking — Past Perfect Continuous: действие длилось некоторое время до другого события в прошлом.

saw, understood, was, knocked — Past Simple: последовательные законченные действия в прошлом.

had told — Past Perfect: Ann рассказала о доме раньше, чем герой его увидел.

was asked — Past Simple Passive: героя пригласил войти голос изнутри.

was sitting — Past Continuous: женщина находилась в процессе действия в тот момент.

have known — Present Perfect: дружба началась в прошлом и продолжается сейчас.

were — Past Simple: период начальной школы остался в прошлом.

is raining — Present Continuous: дождь идёт прямо сейчас.