He talked about the classmates and the school _____ he had visited.
A. who B. that C. which D. about which
【答案】B。解析:先行词为the classmates and the school,从句为he had visited,二者构成的完整句为He had visited the classmates and the school.所以不难发现先行词在限定性定语从句中作visited的宾语使用,先行词既指人又指物。故选B。