English online.com is a free site________visitors can not just learn the English language but also chat online.

English online.com is a free site________visitors can not just learn the English language but also chat online.

1. A.
   where
2. B.
   which
3. C.
   that
4. D.
   what

English online. com is a free site         visitors can not just learn the English language but also chat online.

A．where           B．which           C．that          D．what