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Ответ:

1 The first rocket was lauched into space in 1942

2 Flying is often claimed to be the safest way to travel

3 Modern racing bikes are made of aluninium

4 Two moons have been found on Mars

5 Today few canoes are made from wood

6 The last flight was frown on Concorde in 2003

7 The Moon has been landed on by 12 astronauts so far

8 Trams were introduced in 1820s

9 Today many journeys are made by plane