Question

[võ thị châu phượng]

The astronauts could not have reached the moon without the invention of rockets. We live in the age of rockets, but do you know that rockets are not a modern

(1) _____ ? For centuries, rockets were used to entertain people. The Chinese used

rockets (2) ______ fireworks. In the 13th century, rockets were first used in war. The

Mongols used rockets to attack a Chinese city in 1232. These early rockets could not

(3) ________very far. However, in 1885 a Russian scientist discovered a better fuel for rockets. This liquid fuel gave rockets much more power. Then in 1919 a new age of rockets began. In that year an American scientist, Robert Goddard, said that it was

(4 )______ to send a rocket to the moon! Goddard launched his first liquid-fuelled rocket

in 1923. It flew 184 feet. Almost 12 years later, he sent a rocket 7,500 feet into the

air in 1935. Russian rockets sent the first (5) ______ into orbit in 1957. Just 12 years

later the first man walked on the moon – thanks to rockets! Where will rockets take us next?