1. Larry was playing computer games while his brother chatted with a friend yesterday evening.
В данном предложении использованы Past Continuous (для действия, которое длилось в определенный момент в прошлом) и Past Simple (для действия, которое произошло в прошлом и закончилось).
Ответ: Larry was playing computer games while his brother chatted with a friend yesterday evening.