Choose the correct particle: I explaned it carefully, but I just couldn't get through/along to her

I. Choose the correct particle
1. I explaned it carefully, but I just couldn't get through/along to her.
2. It's very important for a teacher to be able to get his ideas over/across t his students.
3. It was really hard for Sue to get through/over her divorce from her husband.
4. Have you and your sister always gotten across/along with each other?