Because Mary and Samantha arrived at the bus station before noon , I did not see them at the station;
While he waited at the train station, Joe realized that the train was late;
After they left on the bus, Mary and Samantha realized that Joe was waiting at the train station;
Though he was very rich, he was still very unhappy;
She returned the computer after she noticed it was damaged;
The movie, though very long, was still very enjoyable.