12. Tom was very tired. He ... football for hours. a) had played b) had been playing c) played

Перевод задания: Том очень устал. Он ... в футбол несколько часов.

b) had been playing — Tom was very tired. He had been playing football for hours. (Том очень устал. Он играл в футбол несколько часов.)

Past Perfect Continuous подчёркивает длительное действие, которое привело к усталости.