Answer:
1. The girls had left early, but they arrived home too late for dinner.
2. Not related
3. Not related
4. Kathleen had cut out a new pair of slacks and Marianne was working on the jacket.
5. Not related
Step-by-step explanation:
1. Both of the sentences are about the girls and when the were going/coming.
2. Their bus and their dog are not related.
3. The party and sewing are not related.
4. Both sentences were about a girl sewing or something like that.
5. The material and a cold drink are not related.
I'm not very good at this, so I'm sorry if the explanation isn't very good.