Watch the video again and circle the correct answer. 1 London is a very big city. 5 million / 9 million people live there. 2 When the London Underground first opened, it had 7/70 stations. 3 You can / can't sit at the top of a double-decker bus. 4 It sometimes / often rains in London! 5 You can take a river bus / a river taxi to work. 6 The cheapest way to travel round London is by bike / bus. 7 You can take a cable car across the river / the city!