— Do you know something about Kwanzaa?

    — It is _____festival celebrating the culture and history of African Americans.

A．a seven-day      B．a seven-days     C．a seven day      D．seven days

 — Do you know something about Kwanzaa?

 — It is _____festival celebrating the culture and history of African Americans.

1. A.
   a seven-day
2. B.
   a seven-days
3. C.
   a seven day
4. D.
   seven days