They passed slowly through the room and came to the last.
Another car passed slowly enough to get a good look, and then went on its way.
So the days passed slowly, and they were a kind of white time.
The three hours we'd said it would take us passed slowly.
The rest of the morning and the afternoon passed slowly.
Nobody else came out to us and time passed slowly.
Time had passed slowly, and the air was very thin.
Meanwhile, time passed slowly for the rest of the group.
The long day passed slowly and it grew very hot.
The days passed slowly, and I made no more return visits to the city.