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.

结扎输卵管常在哪个部位进行（）

A.输卵管子宫部

B.输卵管峡部

C.输卵管壶腹部

D.输卵管漏斗部

E.输卵管伞