What did the manager ...you to ...at the meeting?

What did the manager ...you to ...at the meeting?
A.tell...say B.ask ...speak
C.tell...speak D.ask...talk
知道答案四A,但是B和A究竟有什么不可以呢?什么是重要因素?大家好好解答,是speak和 say的区别?
答：应该选择 A
ask sb.to do sth.让某人做...（含有较强的命令语气）
tell sb.to do sth.叫某人做某事 (不含有较强的命令语气)
speak 后接语言,不接谈话内容
say sth .说点什么,这个say后面可以接谈到什么了