3. While I (try) ________ to concentrate on my studies, my friend (play) ________ her music very loudly in the next room.

3. While I (try) ________ to concentrate on my studies, my friend (play) ________ her music very loudly in the next room.

Для решения этого задания необходимо определить, в каком времени нужно употребить глаголы в скобках: Past Simple или Past Continuous.

Первый глагол (try) описывает действие, которое длилось в определенный момент в прошлом, поэтому используем Past Continuous. Форма глагола try в Past Continuous - was trying.

Второй глагол (play) описывает действие, которое происходило одновременно с первым действием, поэтому используем Past Continuous. Форма глагола play в Past Continuous - was playing.

Таким образом, предложение будет выглядеть так:

While I was trying to concentrate on my studies, my friend was playing her music very loudly in the next room.

Ответ: While I was trying to concentrate on my studies, my friend was playing her music very loudly in the next room.