I’m sure that you have told him will make some to his decision.A. what; differenceB. that;

问题补充：

I’m sure that you have told him will make some to his decision.

A. what; difference

B. that; difference

C. which; effect

D. what; effect

答案：

(答案→)A. what; difference

B. that; difference

C. which; effect

D. what; effect

解析：考查主语从句和固定词组。第一空what引导主语从句what you have told him在句中做tell的宾语。第二空是固定词组make some difference起作用，有影响；句意：我敢确信你告诉我的事情会对他的决定起一些作用。故A正确。