—It took me ten years to build up my business and it almost killed me.—Well you know wha

问题补充：

—It took me ten years to build up my business, and it almost killed me.

—Well, you know what they say. .

A. There is no smoke without fire

B. Practice makes perfect

C. All roads lead to Rome

D. No pains, no gains

答案：

A. There is no smoke without fire

B. Practice makes perfect

C. All roads lead to Rome

(答案→)D. No pains, no gains

解析：考查交际口语。由上文可知，是“不劳无获”。