Read the passage and choose the correct answer for each question.
London is the capital city of the United Kingdom. There are a lot of cars in the city. People go everywhere by car, so traffic in the city centre is heavier than that in the suburbs. It is harder to find a place to park a car than to do it in other areas. The public means of transport is cheaper than cars but the Londoners prefer their own cars. Moreover, there are more and more tourists and visitors coming to London for sightseeing or shopping. At weekends, the streets are noisier and busier than they are on weekdays. Now, traffic jams are worse than ever before.
Although the living cost in the suburbs and the countryside is cheaper than that in the city centre, most young people prefer living in the city centre. London is richer than other cities in the United Kingdom, but it is more polluted because of the city industry, vehicles, and plenty of people.

The living cost in the city centre is __________.