8. She ___ her dog last night. a) didn't walked b) didn't walk c) walks

The correct answer is b) didn't walk.

The sentence is a negative statement about a past event ('last night'). The auxiliary verb 'did' combined with 'not' (didn't) is used to form the negative past tense. The main verb 'walk' remains in its base form.

Ответ: b) didn't walk