Please correct these sentences:
1. Last year, when they have gone here for the first time, they made many noises.
2. Last year, when they went here for the first time, they made many noises.
3. When they went here for the first time, they made many noises.
4. When they have gone here for the first time, they made many noises.
5. When the manager wasn't here, when they have gone here for the first time, they made many noises.
6. When the manager wasn't here, when they went here for the first time, they made many noises.
Thanks
Quoc