选 A
分析一下
A项,Say：说,不管你说什么,用什么语言.Say it in ENGLISH or Say it in French ,It's does not matter.
B项,Speak 讲（后面跟语言） Speak English speak French,通话,May i speak to Mr XXX
C项 Tell 告诉,一般用法为 tell sd sth 或者是 tell sb that 或是祈使句Tell me .
D向 Talk 交谈.谈话 Talk with sb / have a talk with / this is what i am talking about.
个人意见,仅供参考