A、Playing basketball. B、Cleaning. C、Shopping around. D、Planning his work. B女士问的是“你昨天打篮球了吗?”男士回答说“我本来打算去打的，但天下雨了，于是我就打扫房间了。”故选B。

M: Make 20 copies for me.
W: Yes, sir. I will do it right now.
Q: What is the probable relationship between the two speakers?

W: Did you play basketball yesterday?
M: I planned to. But it rained. So I cleaned the room instead.
Q: What did the man do yesterday?