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heard

ate

made

saw

flew

thought

went

bought

2 ate

3 made

4 saw

5 thought

6 went

7 bought

The history of rail transport in Germany dates back to the 16th century. The earliest form of railroads, railcars , was developed in Germany in the 16th century. The modern history of German railways officially began with the opening of the Ludwig steam-powered Bavarian Railway between Nuremberg and Fürth on 7 December 1835 . This was preceded by the opening of the Prince William Horse Railway on 20 September 1831. The distance railway was the Leipzig-Dresden Railway, built on 7 April 1839. History of rail transport in Germany -The predecessor of the railway in Germany, as in England, is mainly associated with the mining industry. Mine carts were used for transportation underground, initially using wooden rails, and were driven either by a guide pin between the rails or by flanges on the wheels. The wagonway operation was illustrated in Germany in 1556 by Georgius Agricola (image right) in his work De re Metallica . This line used "Hund" bogies with flanged wheels moving on wooden planks, and a vertical pin on the bogie inserted into the gap between the planks to keep it moving properly. The miners named the wagons Hunde ("dogs") because of the noise they made on the tracks. Such cars soon became very popular in Europe. History of rail transport in Germany  

Объяснение:

1. The problem is so difficult to solve

2. The box is so heavy to carry .

3. The baby is so little to walk.

4. He is so weak to lift this weight.

5. She is so busy to talk with you.

6. She was so inattentive to notice the mistake.

7. The rule was so difficult to understand it. 8. He was so stupid to see the joke.

9. She has got so fat to wear this dress now.

10. The accident was so terrible to talk about it.

11. They were so empty-headed to learn a single thing.

12. The window was so dirty to see through it.

13. She was so foolish to understand my explanation.

14. My wool is too little to make a sweater.