"Keep one's word" means you do __you have told someone__you would do.
A.that;that; B.that;what C. what;that
D.what;what
　答案：选Ｃ。请问为什么？

"Keep one's word" means you do __you have told someone__you would do.
A.that;that; B.that;what C. what;that
D.what;what

keep one's word 大致就是遵守某人的诺言
这句话只要看后面一部分就行了：
you do __ (what) you have told someone__(that) you would do
what=the thing that
所以就可以转化为：you do the thing that you have told someone__(that) you would do
前面一个that是引导定语从句的，括号里的that是引导宾语从句的，看懂了吧？

遵守诺言意味着去做你答应过别人你会去做的事。