IELTS SIMULATOR ONLINE ACADEMIC LISTENING - Balloons and Airships S40AT4 FREE COMPUTER DELIVERED ONLINE IELTS SIMULATION
IELTS LISTENING

Balloons and Airships

Lecturer :

Now balloons and airships are worth consideration because while on the one hand, they represent humans’ first successes at air flight after centuries of less than successful theory and experimentation, they also, on the other hand, continue to be used today. We may have appeared to have moved on to jet planes and space rockets, but you can still see these more primitive flyers in the skies.

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