Tài liệu "Ôn thi Đại học môn Tiếng Anh: Practice test 9" gồm 80 câu hỏi với hình thức trắc nghiệm, ngoài ra tài liệu còn kèm theo phần đáp án giúp người học kiểm tra và ôn luyện hiệu quả hơn. . | Public transport plays a central role in any (71) _ urban transport system. In developing (72) where at least 16 cities are expected to have more than 12 million people each by the end of this decade, failing to give priority to public transport would be (73) _ . The term ‘public transport’ covers many different types of vehicles, but most commonly refers to (74) _ and trains. Rail services fall into four major categories, rapid rail (also called the underground, tube, metro, or subway), which operates on exclusive (75) _ or on elevated tracks; trams, which move with other traffic on regular (76) _; light rail, which is a quieter, more modern version of trams that can run either on exclusive way or with other traffic; and suburban or regional trains, which (77) _ a city with surrounding areas. The recent trend in many (78) _ is toward light rail over ‘heavy’ rapid rail systems. Whereas metros require exclusive rights-of-way, which often means building costly elevated or underground lines and stations, light rail can be build on regular city streets.