5. Super cars will run ________________________________________________ water in the future. A. to B. at C. on D. for 6. This is the first time that I ________________________________________________ a 3D film. A. watch B. watched C. have watched D. have never watched 7. Children can participate in a TV ___________________________________________ for a game show or a quiz show. A. channel B. competition C. studio D. cartoon 8. Football is _________________________________________ popular sport in the world. Everybody loves it. A. more B. most C. the more D. the most 9. If we all use ____________________________________________ bags, we will help environment. A. new B. cheap C. reusable D. reduced