Did you decide ____ the place of the meeting?

选B
decide的用法
decide:[ di'said ]
v.决定,判决
不同情况,可能接不定式或名词宾语等,例句如下：
1.Don't decide on important matters too quickly.
不要过于匆忙地对重要的事情作决定.
2.He decided to get married.
他决定结婚.
3.A chance meeting decided my career.
偶然的会面决定了我的事业.
4.That decided me to leave my job.
那件事使我决定离职.
5.It's difficult to decide between the two.
对这两者,不易做出抉择.
6.With so many choices,it's hard to decide (what to buy).
有这麽多可选择的,真难决定（买什麽）.
7.The judge decided for/against the plaintiff.
法官判决原告胜诉[败诉].
8.The judge will decide (the case) tomorrow.
法官明天判决此案.

b decide on对...作出决定[决议]