Ex: khoanh vào đáp án đúng 6. You have never heard about teleportation, _____? a. do you b. don't you c. have you d. haven't you 7. With a solar PV system, solar panels _____ sunlight right into electricity. a.create b. generate c. provide d. convert 8. Self-driving cars are expected to be _____ than human-driven ones. a. more safely b. less safe c. more safer d. much safer 9. Mumbai is land of some of the world's richest people. _____, it is also home to the world's poorest. a. Although b. Therefore c. However d. Despite 10. "Should I use public transport or a bike to reduce carbon dioxide?" “_________” a. Of course. It helps to reduce your carbon footprint, you know. b. Why not? It will harm the environment. c. I won't advise you to do so. d. How about taking your car?