III. 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 wayto 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 26. Solar energy is and it can be replaced easily. A.new B.renew C.renewable D.non-renewable 27. For many people living in rural areas, biogas is a cheap energy available. A.method B.production C.supply D.consumption 28. Nuclear energy can provide enough electricity for the world’s needs, but it is very . A.risk B.risky C.endanger D.endangered 29. Alternative sources of energy are and safe. A.enough B.not enough C.short D.abundant 30. Sources of energy will be used more for our future. A.effective B.efficient C.effectively D.efficiently 31. A sky safety system will stop everyone crashing in the sky. A.at B.from C.through D.for 32. regular light bulbs with low energy light bulbs, which use less energy. A.Turn B.Replace C.Place D.Put 33. Without good insulation, the in our houses goes out through the windows, the doors, etc. A.ice B.atmosphere C.amount D.heat 34. A(n) station will be built in the North of the country next decade. A.hydropower B.water C.hydroelectricity D.energy 35. We can the problem of energy shortage by using solar energy. A.carry out B.get C.recover D.solve 36. Don’t forget to the lights when leaving a room or going to bed. A.turn B.turn on C.turn off D.turn out 37. What should we do to our electric bills? A.fall B.cut down C.drop D.reduce 38. The use of biogas for cooking in the countryside. A.will increase B.will be increasing C.will be increased D.will have increased 39. The digital camera belongs to Nick. That camera is . A.him B.he C.his D.one 40. Is this schoolbag ? A.you B.your C.yours D.them 41. The city is working on a project the slums with clean water. A.providing B.provide C.to provide D.to providing 42. In that country, over 30% of the population live in . A.poor B.poorer C.poverty D.the poor 43. Children who malnutrition can have a lot of diseases. A.suffer from B.avoid C.gain D.obtain 44. There are more problems in the slums than in the areas. A.wealth B.richness C.wealthy D.country 45. is quite popular in an overcrowded city where you can see people sleeping in a park or under a bridge. A.Homeless B.The homeless C.Homelessly D.Homelessness