.3.Fill in the blanks using suitable words given below.(4marks)
Passenger airplanes mostly fly…… speeds less than……….sound.Airplanes…..
…….Canfly……..greaterspeedhavebeenbuilt.Thisis……….iftheyfly…………….
Speedsgreater………..the speed ofsound,fuel consumption increases enormously
Hints:which,of,at,because,at,the,than,at
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in, the, are, very, why, in, in,
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