Question

Let's learn to use the problem we are facing ______ a stepping-stone to future success．

A．to

B．for

C．as

D． by

Answer 1

C

试题分析：考查介词：A. to 给，B. for为了，C. as 做为， D. by通过，句意是说，我们要学着把我们面对的问题作为通向未来成功的垫脚石来用。选C。