In 1783, two French brothers built the first balloon to take people into the air. One hundred and twenty years later , in 1903, the Wright brothers built the first plane with an engine and flew in it. This was in the United States. Then, in 1918. the US Post Office begin the first airmail service. Aeroplanes changed a much in the next thirty years. Then, in 1950s, aeroplanes became much faster because they had jet engines. In 1976, Concorde was built in the UK and France. It 15 uhe fastest passenger plane in the world and it can fly at 2500 kilometers an hour, so the journey from London to New York is only four hours. Today millions of people travel by aeroplane, and it is difficult to think of a world without them.

Mấy từ mình in đậm là mấy từ chữa lại rồi nha

=>
1. begun - began

2. much -> lot
3. build -> built
4. in -> from
5. on -> by