Supposing your partner left his/her bag in the library and you picked it up.Make a dialogue about that between your partner and you.

假设你的同伴把书包落在图书馆，你捡到了书包。和你的同伴关于这个话题做一个对话。 OirgCc2/KR7Wx4mHhi/eQZM9bsq0Qmsz85FGska1oSERXNiXPsbR++z8KzQDEPcN