Could you tell us ________ happens when one student in class expresses a personal opinion ________ maybe offends other students?

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

Could you tell us ______ happens when one student in class expresses a personal opinion _______ maybe upsets other students?

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

Could you tell us ________ happens when one student in class expresses a personal opinion ________ maybe offends other students?

   A．that；that        B．what；where   

C．that；where       D．what；that.

Could you tell us ______ happens when one student in class expresses a personal opinion _______ maybe upsets other students?

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