Rewrite the sentences

1. She is considering whem she should join the eco-tour.
-> She is considering when __
2. We were discussing the community's future plans when the power went out.
-> While we ___.
3. I' ve never seen a coral reef before. I want to see it someday.
-> I wish i_.
4. If you concentrate on one task, you can complete it more efficiently.
-> The longer you___.