Uzupełnieniem zdania czasownikami z nawiasów w poprawnej formie czasu past simple lub past continuous.

1. (you/walk) ............ to school when I (see) ............ you this morning?
2. We were surprised when someone (knock) .......... on the door last night because we (not/expect) ............. anyone
3. Why (Mary/sit) .......... alone in the corner when we (arrive) ......... at the party?