7、One possible version：

According to the graph, there are many dramatic changes in the use of transport from 1988 to 2008．

The use of cars increased significantly，from 1988 to 2008．In 1988，only 10％of the people drove to work，but in 1998，about one quarter of the people owned a car，and moreover，by 2008，the number of people who went to work by car jumped to 30%．

During the same period，there were gradual decline in the use of bicycle and on foot．In 1988，more than half of the people were cycling or walking to work；in 1998，the use of bicycle and on foot still occupied over 40％，and however，in 2008，the number of these people decreased to less than 30％．