One summer weekend, some friends and I decided to take a picnic to a waterfall we had heard about. Some people
drive
drove
had driven
driving
cars and ____________ the food,
take
took
had taken
taking
but the rest of us __________ to walk. Since it was too far to walk along the road, we followed a railroad line. We had walked five or six miles when we came to a high rock wall where the tracks entered a tunnel
want
wanted
wanting
had wanted