Introduction:
Attention grabber + bridge + thesis statement
The bridge consists of two or three sentences to guide your reader from your attention grabber to the thesis statement without revealing your arguments
Examples:
Thousands of cyclists in the Netherlands suffer severe head injuries every year. This number has to be decreased. Helmets should be obligatory in the Netherlands because they protect cyclists.
Traffic jams during rush hours are terrible in the Netherlands. It is a small country and everybody needs to get to work. The government should make sure fewer people go by car. Taking the train or bus should be encouraged. Public transport should be free in the Netherlands because they would relieve the roads from traffic jams.