【单选题】

ItExample: (0) ) already late (41) we set out f or the next town, which was about fifteen miles away on (42) side of the town.

There we felt that we (43) find a bed for the night. It was getting dark (44) after we left the village, but (45) we met no one, (46) we drove fast along the narrow roaD、As we climbed at times to see the road, I asked John, my friend, (47) more slowly.
After we had (48) for about twenty miles, there was (49) no sign (标志) of the town which was marked (50) the map. We were beginning to get worrieD、
A．to drive
B．drove
C．drive