Answer: cars
2. Puzzle: The feet are round, the eyes are sparkling, beeping and waving to passers-by. ?
Answer: cars
3, puzzle: inflatable rubber legs, drinking oil and water, giving people and carrying things, running as fast as flying. ?
Answer: cars
4, puzzle: four round feet in one, red and green patterns. Many people can hide in the "body" and run around the world anytime and anywhere.
Answer: cars
Extended data:
The rest of the vehicle riddle:
1, puzzle: four eyes are like two bells, four feet are round, and there is a mouth at the waist. I have eaten passers-by. (guess a kind of transportation)
Answer: Bus.
2, puzzle: the iron arm can be long or short, the height can be adjusted at will, it is not difficult to lift and put a thousand pounds, the activity is safe, and it is widely used. (guess a kind of transportation)
Answer: lift car
3, puzzle: carrying an iron cabinet with a water pump, wearing a red robe, the alarm sounds as fast as flying, taking the lead in putting out the fire. (guess a kind of transportation)
Answer: fire truck
4, puzzle: no illness in the hospital, emergency discharge, running back and forth as a comrade-in-arms, saving lives, running ahead. (guess a kind of transportation)
Answer: ambulance
5, puzzle: wearing beautiful clothes, often running on the road, sweating at work, singing all the way. (guess a kind of transportation)
Answer: Sprinkler