Yesterday at the beach, my brother ___ (swim) in the sea while I was building a sandcastle.

1. Last holiday in Bali, we were walking along the beach when my parents ___ (take) some pictures.

While the students ___ (decorate) the school yard, the teachers were preparing the Independence Day ceremony.

At 9 a.m., the principal was doing his work when the students _________ (come) to his office.

While the participants were playing the sack race, the children _______ (laugh) loudly because one of their friends fell down.

While the marching band ___ (play) the national anthem, everyone was standing respectfully.

We were watching the tug-of-war competition, when suddenly it _________ (start) to rain heavily.

While the guides ___ (explain) about the elephants’ habitat, some students were taking notes carefully.

At the same time, the elephants __________ (eat) grass while the visitors were observing them quietly.

We were walking through the forest area, when we ___________ (see) that one of the elephants was drinking water from the river.