Я бы сделал так:
occupation: state of being entered and
controlled by a foreign army
invasion: forcible entry of an army into a
foreign country
roughly: approximately
declining: becoming less and less frequent
native: original (of a country)
revived: brought back to existence
fluently: (spoken) well
Suggested Answer Key
1 During the German occupation of Europe,
many people learned the German language.
2 The wall around the fortress protects it
from invasion by enemies.
3 Roughly half of all the students in the
school can speak English fluently.
4 The number of French-speaking Canadians
is declining due to changes in the language
laws.
5 She speaks Italian, but her native language
is Spanish, as she grew up in Spain.
6 Hebrew was an extinct language until it
was revived in the 19th century.
7 After living in France for almost twenty
years, he speaks French fluently.