Past Progressive

I (walk) to the park when I met John.

She (use) her phone when it suddenly stopped working.

They (discuss) their plans when I joined them.

He (repair) the car all afternoon.

We (try) to solve the puzzle when the bell rang.

You (leave) the office when I called you.

She (talk) on the phone for hours.

The teachers (explain) the rules to the students.

The dogs (bark) loudly last night.

They (celebrate) a birthday when we arrived.