阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

In Europe most capital cities with traffic problems 【小题1】(plan) in a time when there were no cars. The situation in central London, 【小题2】 drivers spent fifty percent of their time in queues, became 【小题3】bad that the local government decided to do something about it. The 【小题4】(solve) is simple: every car   【小题5】 (enter) the centre has to pay £5 a day. People who do not pay the charge will face 【小题6】 fine of £80. Many Londoners who are not happy with the idea think the congestion charge is expensive and limits their 【小题7】(free). But rich businessmen who work in the city centre and can 【小题8】 (easy) afford think the charge should be much 【小题9】 (high) to keep more cars out of central London. However, there are no plans 【小题10】(increase) the charge.