Предложение "He found it, when they ... the house" Нужно вставить глагол "repair" в...

Question

Предложение "He found it, when they ... the house"
Нужно вставить глагол "repair" в правильной форме.

Answer 1

He found it when they were repairing the house.

Answer 2

He found it when they were repairing the house.