1. (2021九上·临海开学考) 从方框中所给单词的适当形式填空，每词仅用一次。

fear   own   it   believe   success

1. （1） It sounds  , but it is true.
3. （2） —How long has your son  the railway set?

   —Since his fourth birthday.

5. （3） Lucy that she goes out alone at night. So she seldom goes out alone.
7. （4） The first man to  in reaching the South Pole was Amundsen Roald.
9. （5） With the development of Internet, the world  is becoming smaller and smaller.