3. What your friends volleyball. What they (do) now? - They (do) at this time a week ago? - They (play)

Ответ:

What are your friends doing now? - They are playing volleyball.

What were they doing at this time a week ago? - They were playing.

Обрати внимание на формы глаголов do и play в вопросах и ответах в Present и Past Continuous.

Present Continuous (am/is/are + V-ing) используется для действий, происходящих в данный момент. Past Continuous (was/were + V-ing) используется для действий, происходивших в определенный момент в прошлом.