Text 4

People have always wanted to learn and share information. At different times they I used different methods to exchange news. They made fires and beat drums to signal important events. Later, they invented letters which were carried by special people called runners. They had to cover long distances to deliver information. The use of horses and birds made the delivery quicker. The state post in Russia appeared in the 17th century. It was rather slow but quite reliable. In 1851, the post started to use the railway. Since then the speed of information exchange has been growing constantly.

People evah always wanted ot learn dna share information. Ta different semit they used tnereffid methods ot exchange swen. Yeht made serif and teabsmurd to signal important stneve. Retal, they invented srettel which were deirrac by special elpoep called runners. They dah to revoc long distances ot deliver noitamrofni. The esu of sesroh and sdrid made the delivery rekciuq. Eht state tsop in Aissur appeared in eht 17th century. Ti was rather wols but quite reliable. In 1851, the post detrats to use the yawliar. Since neht the speed fo information egnahcxe has been gniworg constantly.

Peop le h aveal way swan tedtole arn an ds hare inf ormat io n. Atdif fe r enttime sth eyIu sedd ifferen t m etho dst o exch ang e ne ws. Th eymade fir esan db e at d rumsto si gna li mpo rtantev e nts. La ter, t heyinven te dlet terswhic hwe re c arr iedbys peci alpeop lecal le d run ne rs. T heyhadto cov erlo ngdis tanc estodel ive rin for mat ion. T he us eo fho rs esand bi rds ma det hedel iver yquic ker. Thes tatepos tin Rus si aapp eare dinth e 17th centu ry. Itwa srat hers lowb utquite re li able. In 1851, th e po stst artedtou sethera il way. Sinceth enth esp eedo finfor mat i on exch ange ha sb ee ngr owingcon stant l y.

.yltnatsnoc gniworg neeb sah egnahcxe noitamrofni fo deeps eht neht ecniS. yawliar eht esu ot detrats tsop eht,1581 nI. elbailer etiuq tub wols rehtar saw tI. yrutnec ht71 eht ni deraeppa aissuR ni tsop etats ehT. rekciuq yreviled eht edam sdrib dna sesroh fo esu ehT. noitamrofni reviled ot secnatsid gnol revoc ot dah yehT. srennur dellac elpoep laiceps yb deirrac erew hcihw srettel detnevni yeht, retaL. stneve tnatropmi langis ot smurd taeb dna serif edam yehT. swen egnahcxe ot sdohtem tnereffid desu I yeht semit tnereffid tA. noitamrofni erahs dna nrael ot detnaw syawla evah elpoeP

.y l tnats nocgniwo rgn ee bs ah egna hcxe no i tam rofnif odee pse htne htecniS. yaw li arehtes uotdetra tsts op e ht,1581 nI. elba il er etiuqtu bwol sreh tars awtI. yr utnec ht71 e htnid erae ppaa is suR nit sopetat sehT. rek ciuqy revi ledeh ted am sdr ib dnase sr ohf oe su eh T. noi tam rof nir evi ledotse cnat sidgn olre voc otdahyeh T. sr en nur d el lacel poepla icep sybdei rra c er ewh cihwsret teld et nevniyeh t, ret aL. stn e vetnatr opm il ang is otsmur d ta e bd nase rif edamye hT. sw en e gna hcxe o tsd ohte m t nereffi ddes uIye hts emittne r ef fidtA. n oi tamro fni erah sd na nra elotdet naws yaw laeva h el poeP

Text 5

Making weather forecasts is hard, complicated, scientific work. 70 per cent of its success depends on the accurate analysis of air pressure. Areas of pressure up to 9 kilometers above the Earth are measured by computers. Devices also record the vertical movement of air that can cause clouds, rain and snow. If the air goes down towards the Earth, it destroys the clouds and we can enjoy the blue sky. A front in the atmosphere is another important factor for predicting the weather. The fronts may stretch for thousands of kilometers and can be clearly seen from space. It’s interesting that cold fronts move faster than warm ones.