Across 1

Across 3:

Down 2:

1. a professional cook, especially the main one*

4. a person whose job is to take care of sick or injured people, usually in a hospital

6. the sailor in charge of a ship*

7. a person who studies something carefully and tries  to find new facts about it

8. a person who has been trained for travelling in space*

9. someone who travels to places where no one has ever been  in order to find out what is there

NHANH GIÚP MIK VỚI T_T