Why don't you try to do exercise to lose weight?I have tried everything but it has

问题补充：

--- Why don you try to do exercise to lose weight?

--- I have tried everything but it has made little .

A. effect

B. result

C. difference

D. conclusion

答案：

A. effect

B. result

(答案→)C. difference

D. conclusion

解析：考察固定短语。Make a difference起作用。结合句意可知C正确。句意：—为什么你不锻炼来减肥呢？—我已经尝试了所有的事情，但是都没有什么作用。