Понимание структурно-смысловых связей в тексте

The world of automobiles has made some dramatic changes in the past century. Each year brings more innovative improvements in car technology A______. However, all that brightness might make someone feel a bit curious about how it all began.

Way back in the 15th century, Leonardo Da Vinci was working diligently on designs and prototypes for transport vehicles B ______. It wasn’t until 1769 that an inventor in France built a working self-propelled vehicle. His name was Nicolas Cugnot, and the vehicle was a steam-powered military tractor.

In Scotland, around 1839, Robert Anderson took a ride in his creation, C ______. Today’s modern hybrid cars use technology based upon the ideas first dreamed of almost 170 years ago!

But the legitimate title of Automobile Inventor would have to go to German inventor, Karl Friedrich Benz. It was in 1886 that he received a patent on the world’s first gasoline- powered automobile, D ______.

In the United States, the first patent issued for an automobile was granted in 1789, to Oliver Evans. He performed an amazing demonstration of his vehicle in 1805, E ______. Proudly crowned the first amphibious vehicle, it never quite made it to production for the public.

It was in 1893 that Charles Edgar Duryea, and his brother Frank introduced to Ameri- ca the first gasoline-powered car that worked the way it was supposed to. These two engineering brothers also started the first American automobile manufacturing plant.

A common belief is that Henry Ford invented the first car. However, Henry created his first car only in 1896. He had formed and lost two car manufacturing plants by 1903, F ______. His most famous contribution to the automotive industry was that he invented the first assembly line conveyer belt that revolutionized the manufacturing of automobiles.

1. because automotive companies are planning to do a lot of scientific research
2. when he started The Ford Motor Company
3. which had a combustion engine and three wheels
4. when he showed the crowd that his automobile was able to travel on land, and in the water by using a paddle wheel

5. but, unfortunately, none ever came into being
6. so the future looks bright for both car buyers and car manufacturers
7. which he called the Electric Carriage