Can you describe the people and the things___have been seen in Tibet?A which B.that C who D /.

问题描述:

Can you describe the people and the things___have been seen in Tibet?A which B.that C who D /.
先行词不是人和物用that 为什么答案是which?

相信自己,答案是B
先行词有人也有物时用that