5. Underline the correct option using one of Past Tenses:
1. He had studied / had been studying all night and was exhausted.
2. When she got paid, Julie realized that her boss gave / had given her a pay rise.
3. Did you arrive / were you arriving at the airport on time?
4. While I waited / was waiting for him to call up, he had a good time in the bar.
5. The party had started / started already by the time I arrived.