Just then an armored car came across the bridge and advanced slowly up the street. It stopped on the opposite side of the street, fifty yards ahead. The sniper could hear the dull panting of the motor. His heart beat faster. It was an enemy car. He wanted to fire, but he knew it was useless. His bullets would never pierce the steel that covered the gray monster. 11. The author compares the enemy armored car (or tank) to a