我们正在找那个丢了钱包的人。

We are looking for the man ___whose wallet was lost.

她是我最好的朋友，她的名字叫安娜。

She is my best friend, ___whose name is Anna.

那是一座老房子，其地下室曾被淹过。

It was an old house, ___whose basement had been flooded.