____ the young people keep learning it, they can pass on Dai culture from generation to generation.

1. A.
   Even though
2. B.
   As soon as
3. C.
   As long as
4. D.
   As though

____ the young people keep learning it, they can pass on Dai culture from generation to generation.

A. Even though           B. As soon as               C. As long as                D. As though