16 Complete the text with the verbs from the box, using them in the Present Prefect Tense. to give to use to adapt ... to become Bicycle to ride to improve to change ... you ever ... a bicycle? Certainly you have! Bicycles ... a part of modern life, the means of transportation which ... us an opportunity to move around and avoid traffic jams in big cities. People bicycles since the 19th century. Although the basic shape and configuration of a typical upright bicycle a little since the first chain-driven model was developed around 1885, people bicycles for such uses as children's toys, adult fitness, military and police applications, courier services and bicycle racing. Since the 19th century engineers ... many details to make the process of cycling more comfortable and fast. As the bicycle is an environmentally-friendly means of transport, cycling can contribute to the solution of the problem of air pollutions in megalopolises. 17 Make up questions using the Present Perfect Tense and answer them. (Use the text of ex. 16.) 1) What opportunity/the/bicycle/to give/in modern life? 2) Since/what century/people/to use/bicycles? 3) What uses/ people/to adapt/bicycles/for? 4) Why/the engineers/to improve/the details/of the bikes?​

"... Have you ever ridden a bicycle? Certainly you have! Bicycles have become a part of modern life, the means of transportation which gives us an opportunity to move around and avoid traffic jams in big cities. People have used bicycles since the 19th century. Although the basic shape and configuration of a typical upright bicycle have changed a little since the first chain-driven model was developed around 1885, people have adapted bicycles for such uses as children's toys, adult fitness, military and police applications, courier services, and bicycle racing. Since the 19th century, engineers have improved many details to make the process of cycling more comfortable and fast. As the bicycle is an environmentally-friendly means of transport, cycling can contribute to the solution of the problem of air pollution in megalopolises."Now, for the questions:1) What opportunity does the bicycle give in modern life?2) Since what century have people used bicycles?3) What uses have people adapted bicycles for?4) Why have the engineers improved the details of the bikes?