0. On Friday evening one member of my family was doing a project. 1) Who was doing a project?

1) Чтобы ответить на вопрос "Who was doing a project?", нужно посмотреть на предложение в условии: On Friday evening one member of my family was doing a project.

То есть, один из членов семьи делал проект.

Ответ: One member of my family.