Basketball is so popular a game in the world that ______ people play it for fun and exercise.

Basketball is so popular a game in the world that ________ people play it for fun and exercise．

1. A.
   million of
2. B.
   millions of
3. C.
   millions
4. D.
   two millions of

Basketball is so popular a game in the world that        people play it for fun and exercise.

A．million of         B．millions of C．millions            D．two millions of