CONCORDE, the world’s fastest passenger plane, will soon be over 33 years old. It first 1__ on 2 March 1969 in France. Concorde was developed by __2__ France and Britain. From 1956 these two countries had a 3__ of a supersonic（超声波）passenger plane. In 1962 they started to __4__ together on the project. The plane 5 over 1.5 billion pounds to develop. It is the most tested plane in the history. It was given over 5,000 hours of
