4. 1)Maluerindi thinks that we can do nothing about his loneliness.
2)In the next 100 years 3000 languages will disappear.
3)Because people who speak these languages are dying from many reasons. Also, because of the big world languages.
4)People need to record the language and write it down. Then write grammar books, dictionaries and other.
5)Because when languages dies they left nothing behind.
5. 1 - b
2 - e
3 - a
4 - c
5 - d
6 - f