1 future plans?

*: “In the last decade, the number of vehicles in central London has fallen by a further 30% and plans to reduce the number of parking spaces for cars will probably cause it to drop again.”

=> C

2 something coming back to life?

*: “There are now hundreds of different types of animal and bird feeding on its banks, over 125 different species of fish swimming beneath its surface,”

=> A

3 people dying?

*: “when the smog of December 1952 caused four thousand deaths in one week,”

=> B

4 an attempt to stop something from happening again?

*: “A series of 'clean-air' laws were passed to avoid a repeat of the tragedy, and since then the quality of London's air has improved greatly,”

=> B

5 charging people so that everyone's lives would be improved?

*: “To improve journey times and the quality of London's air, a daily charge of £5 was introduced in 2003 for all vehicles being driven in the city.”

=> C

6 something that has received awards?

*: “Half a century later, the Thames has won international prizes for rivers that have been restored.”

=> A