题目内容：

阅读下面材料，在空白处填入适当的内容或括号内单词的正确形式。

In Europe, most capital cities 1.（plan)and built before cars,and city centre traffic jams 2.（be)part of daily life for a long time.The situation in central London, 3.drivers spent fifty percent of their time in queues,became so bad 4. the local government decided to do something about it.In February 2003 the mayor of London introduced a"congestion charge"-a tax for cars 5.（enter)the centre of the city.