Fill in the gaps using the word in the brackets. These sentences are in the past perfect.
After they ____________________ (eat) the shellfish, they began to feel sick. After they had eaten the shellfish, they began to feel sick.
1. Julie didn’t arrive until after I (leave).
2. He (meet) her before 5 pm.
3. The grass was green because it (rain) all summer.
4. The children (do) their homework, so they weren't in trouble.
5. They (eat) before we went home.