כנסו בבקשה עזרה באנגלית Past simple or past progressive

1. When I _______ (walk)into the office yesterday morning, the secretary _____(talk)on the phone with a customer.
2. We _____(look)for our umbrellas when the rain _____(stop
3. I______ (meet) my friends while I _____(shop) yesterday
4. What ____(you do)last night when I ______(phone