It was already late when we set out for the next town, which according to the map was about fifteen kilometres away on the other side of the hills. There we felt that we would find a bed for the night. Darkness fell soon after we left the village, but luckily we met no one as we drove swiftly along the narrow winding road that led to the hills. As we climbed higher, it became colder and rain began to fall, making it difficult at times to see the road. I asked Jihn, my companion, to drive more slowly. Afler we had travelled for about twenty kilometres, there was still no sign of the town which was marked on the map. We were beginning to gel worried. Then without warning, the car stopped and we found we had run out of petrol.
The author asked John to drive more slowly because