Find which word does not belong to beach group. 11. A. cycle B. drive C. ride D. fly 12. A. coal B. gasoline C. wind D. natural gas 13. A. plentiful B. short C. abundant D. unlimited 14. A. convenient B. comfortable C. enjoyable D. difficult 15. A. save B. recycle C. conserve D. waste IV. Choose the correct answer. 16. Driverless cars have already , and they look so cool. A. gone B. travelled C. exist D. existed 17. If I have a jet pack. I will use to fly anywhere easily. A. my B. mine C. his D. their 18. I think teleportation is only . A. imagine B. imaginary C. imaginable D. imagining 19. Do we need much to park that kind of vehicles? A. land B. ground C. soil D. space 20. Do you think it will be (an) , green way to travel? A. convenient B. inconvenience C. polluting D. polluted 21. I think in the future cities will be more crowded and the traffic will get . A. good B. well C. worse D. worst 22. Which is the best of transport for the future? A. mean B. means C. traffic D. ways 23. Sidewalks are to moving walkways in airports. A. familiar B. similar C. different D. same 24. We are looking for cheap, clean, sources of energy. A. polluting B. harmful C. expensive D. effective 25. We should try to reduce energy as much as possible. A. production B. producers C. consumption D. consumers