Complete the following sentences.
1. A person who has invented / designed something is called ......
2 . Leonardo da Vinci made many drawings of ... .
3 . In ... Sir Harold Thomas Flower created the first electronic computer .
4 . .... is the science of life .It deals with great diversity of life forms .
5 . ... is a science about matter and energy such as light , heat , sound .
6 . The theory of relativity was developed by ... .
7 . The first step on the Moon was taken by
8. The radioactive elements radium and polonium were discovered by ... .
9 . The first bicycle was built in
10 . The telephone was invented by ... in 1875 .
11 . The ..... ... ... was ddiscovered in 1953 .
12 . The first personal computer was launced by ...
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