阅读下面短文，在空白处填入1个适当的单词或括号内所给单词的正确形式。

In just 100 years, the world changed 【小题1】(complete). Amazing 【小题2】  (discovery) were made in medicine, communications and transport,  【小题3】 to mention our knowledge of the world and space. Impossible 【小题4】 it is to choose the most important discovery, it’s possible to pick out some pioneers. Einstein 【小题5】 (become) world-famous when an ex-lawyer started work in California Hubble discovered mist , 【小题6】 proved that the universe was larger than previously 【小题7】 (think). Before Fleming went on holiday, he left a dish 【小题8】bacteria in it in his lab. When he returned, he saw a blue mould in the dish around which the bacteria  【小题9】 (destroy). The mould was the  【小题10】(nature ) form of penicillin.