Ask for information. Write 5 types of questions
I finished reading an article about climate change.

I finished reading an article about climate change.

(Past Simple, вспомогательный глагол - did)

Общий: Did I finish reading an article about climate change?

Альтернативный 1: Did I finish or begin reading an article about climate change?

Альтернативный 2: Did I finish reading or writing an article about climate change?

Разделительный: I finished reading an article about climate change, didn't I?

Специальный:      What did I finish reading?

Вопрос к подлежащему:  Who finished reading an article about climate change?