It doesn't make any now what he says -- it's too late for apologies.
A. difference
B. effect
C. progress
D. development
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(答案→)A. difference
B. effect
C. progress
D. development
解析:句意:现在你说什么都不起作用了---道歉已为时已晚。make a difference(to) sb/sth有影响,起重要作用;have an effect on sb/sth有影响;有作用;取得进步;make developments取得发展。只有A项从意思和搭配上符合题意。