Temporary failure is not to be feared. We must bear it in mind that the pains-taking effor

问题补充：

Temporary failure is not to be feared. We must bear it in mind that the pains-taking efforts we have made will in the long run.

A. pay off

B. take off

C. break off

D. work off

答案：

(答案→)A. pay off

B. take off

C. break off

D. work off

解析：考查短语辨析。pay off还清，得到回报，take off 脱掉，break off中断，work off慢慢除去，根据语境是从长远来看我们付出的努力将会得到回报。故选A。