You have to be accurate in this job because a small mistake can make a big .A. differenceB

问题补充：

You have to be accurate in this job，because a small mistake can make a big .

A. difference

B. difficulty

C. trouble

D. change

答案：

(答案→)A. difference

B. difficulty

C. trouble

D. change

解析：考查名词：A．difference不同B．difficulty困难C．trouble麻烦 D．change改变，make a big difference有很大影响。句意：做这个工作要精确，因为一点的错误都会产生很大影响。选A。