Past simple and continuous

What ______ (they/weave) when the lights suddenly went out?

When the archaeologist ______ (find) the scroll, he immediately reported it to the team.

Who ______ (scribble) notes on the whiteboard while the teacher was talking?

The librarian ______ (stack) books on the shelf before the students arrived.

The dog ______ (bark) loudly when the kids were playing in the yard.

Someone ______ (spread) a rumour about the new rule last week.

She ______ (sit) on the edge of the riverbank when the sun set.

She ______ (follow) the recipe carefully when her phone rang.

While the teacher ______ (describe) the main character, the students were taking notes.

The artist ______ (make) a pot out of clay when the museum opened its doors.

What ______ (ancient civilizations/build) when archaeologists discovered their tools?

He ______ (wear) a leather jacket when he entered the room.