1. petrol
2. driverless
3. solar
4. helicopter
5. high - speed
1. A liquid used as fuel in car engines p e t r o l
2. A ______ car is a car without drivers d r i v e r l e s s
3. Energy from the sun s o l a r
4. An aircraft without wings that can fly straight up from the ground h e l i c o p t e r
5. That travels, works or happens very fast h i g h - s p e e d