I. Listening: Listen and write the missing words. The most common traffic(1)……………in cities around the world is(2)............ jams. Sao Paulo in Brazil has the world’s worst(3)............... traffic jams. According to reports, the(4)..................... congestion record was set on June 1, 2012, with 295 (5)....................... of vehicle queues around the(6)...........during the evening rush hour. Some other big cities also suffer from serious congestion in the rush hour. The main cause of this traffic problem is the increase of the(7)...................... in big cities. So the number of people using the roads has risen several times. The second reason is that the roads are narrow and sometimes are not(8).....................enough. Also, many road users have no respect for traffic rules. As a result, this problem is getting worse and worse.