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Вставить пропущенные слова 1)there was a long sentence at the begin of the text 2)jane stood absolutely didn't know what to answer.3) richard's was a boring and an end .4)there are a lot of (borrow) french in the english language.5)last month there was a very unusual happen the town where i live6) how many people were there at the ) in the 21 st century you can see a lot of people in big cities8)the sun was shining brightly in the in the sky.9)theirs was a family.10) i'm at cooking .don't ask me to help.

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Ахмрев
Ахмрев
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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 .

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