Решить задания по английскому

In the morning we went to the forest. The dawn brightly flared up in the sky. The first rays of the sun burst through the clouds and played with green grass. From this game grass in the clearings burned and turned yellow. A small streamlet hid from the sun in the thick grass. We settled on its shore, sunbathed and enjoyed the summer. In the evening they lit a fire. It burned very beautifully. The languages ​​of the fire devoured dry branches of trees one after another. Therefore, on hot coals we baked potatoes. The potato was burnt, but did not lose its taste. We ate it with great appetite. The night came, the stars flared up in the sky. They caused us a cheerful mood. We sang songs and listened to music. The burning stars lit up our happy faces.

1)  During this period the track structure has been substantially improved. One of the greatest improvements was the elimination of rail joints. In order to reduce the number of joints the rails are welded into continuous lengths.These continuous or long welded rails have greater strength and provide a smoother running of trains at far greater speeds.
2) Another improvement which has made it possible to increase speeds on railways is the use of concrete sleepers. Thus in some countries , concrete sleepers have replaced wooden ones on heavily used main lines because of their advantages.
Concrete sleepers have a longer life and a far greater weight than those made of wood. The greater weight of concrete sleepers provides the greater stability of track.
It is this factor which has greatly contributed to increased speeds.

ответ взял прямо из текста. Насколько я помню, так надо делать в подобных заданиях.