Помогите с английским.

задание : Complete the sentences using the appropriate words.

1.French is a...for the French.
2.italian is a...for the Germans.
3.Dutch is the...of the Netherlands.
4.He can...three foreign language.
5. ...of a language means you can use it in communication.
6.To...means to do well at school.In your work or in something eise.
7.To be...in something means to be one of the best in it.