20. People in some far-away mountainous regions still keep their …………………..way of life. A. traditional B. important C. simple D. written 21. Gathering and hunting still play a(n) …………………role in the economy of the Laha. A. traditional B. important C. simple D. written 22. Ethnic peoples in the mountains have a …………………………………way of farming. A. traditional B. important C. simple D. written