WhenIentered,theyweretalkingabouttheteachersandschools　...

來源：國語幫 1.82W

When I entered, they were talking about the teachers and schools　　　　they had visited.

A. which B. whom C. that D. who

C。當先行詞既包含人又包含物時, 關係代詞只能用that, 因為that可指人, 也可指物。