Galileo Galilei, one of the greatest scientist, was born in Italy. 1.__________

He liked doing experiments to test if or not the previous 2. __________

theories were correct. In the leaning tower of Pisa 3. __________

in their hometown, he found the truth about falling objects 4. __________

through the great experiment. He always observed things 5. __________

carefully and never take anything for granted. Although 6. __________

Galileo found it difficulty for him to make people believe that 7. __________

his theories were correct, he was still stuck to his views 8. __________

His observations showed the theory when 9. __________

the earth moves around the sun was right, not other way around. 10. __________

It was only later that the world recognized his greatness.

      Key: 1. scientist → scientists 2. if → whether 3. In → On 4. their → his 5. √

      6. take → took 7. difficulty → difficult 8. 去掉was 9. when → that

      答案解析：

      1. 名词错误。One of the + 名词复数表示“……之一”，故应用scientist的复数形式。

      2. 连词错误。Whether用来引导从句时可与or not连用，if不能。

      3. 方位介词错误。在比萨斜塔上用介词on。

      4. 代词指代错误。他的家乡用“his hometown”。

      5. √

      6. 动词时态错误。整篇文章的基本时态是一般过去时，故take应改为took。

      7. 名词错用。Find后面接复合结构时，习惯上不用名词作宾补，而是用形容词。所以把difficulty改为difficult。

      8. 语态错误。Stick作“坚持”讲时，不用于被动语态，故was多余。

      9. 连词错误。“the earth moves around the sun”在句中是同位语从句，从句中不缺成分，故应用that引导。

      10. 固定短语表达错误。The other way around表示“从相反的方向”，是固定结构。