Choose the one option(A, B ,C, or D) that best completes the passage. (1m) Urban transport pods. The people (1) in Milton Keynes, a town about 70 kilometres northwest of London, have been introduced to a new transport experience when they use pods (2)..on certain routes. The pods are a kind of driverless cars which travel at 19km/h and are able to transport two people and their luggage. There is a touchscreen in the windshield of the pods where passengers select their terminal. During the trip they can also read news, check e-mails or play videos games on the (3).. Powered by electric motors, the pods have ultrasonic sensors and a (4) system that help themselves know where they are going and how to avoid obstacles along the way. They can use a smart phone app to hail a pod in the street. Obstacles: chướng ngại vật touchscreen: màn hình cảm ứng 17. A. live B. living C. to live D. lived (Low) 18. A. travel B. travelling C. to travel D. travelled (Re) 19. A. screen B. windscreen C. sensors D. wind-powered (Un) 20. A. SSS B. metro C. Go green D. GPS (High)