Problem 19 - Olympiad

Choose the sentence with the correct past perfect tense.

A. She had finished her homework before I arrived.B. She has finished her homework before I arrived.C. She finished her homework before I had arrived.D. She had finish her homework before I arrived.

Correct: A

The past perfect 'had finished' shows an action completed before another past action ('arrived'). The auxiliary 'had' must be followed by the past participle 'finished.'