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S1: Forecasting the weather has always been a difficult business.P : During a period of drought, streams and rivers dried up, the cattle died from thirst and were ruined.Q : Many different things affect the weather and we have to study them carefully to make accurate forecast.R : Ancient Egyptians had no need of weather in the Nile Valley hardly ever changes.S : In early times, when there were no instruments, such as thermometer or the barometer, man looked for tell-tale signs in the sky.S6: He made his forecasts by watching flights of the birds or the way smoke rose from fire.The Proper sequence should be:

A. PRQS
B. QPRS
C. QRPS
D. SPQR
Answer» C. QRPS


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