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whoever whomever who those
do we understand; we can understand we understand; we can understand we understand; can we understand do we understand; can we understand
put on spy on decide on rely on
grammar pronunciation vocabulary intonation
just as old as some well-known languages just as advanced as some well-known languages more developed than some well-known language more complex than some well-known language
has broken into; has been stolen has broken into; had been stolen had been broken into; stolen had been broken; stolen
complicated uncivilized primitive well-known
complicated uncivilized primitive well-known
language is a means of expressing a particular culture. All languages can well express their respective cultures. American Indian languages are as sophisticated as English. Some languages are better than other languages.
enthusiastic energetic intelligent patient
some backward race doesn’t have a language of its own some race in history didn’t possess a language of its own any human race, whether backward or not, has a language some races on earth can communicate without language