volunteering is both a chance to help others and a good way to develop ourselves.So you

问题补充：

, volunteering is both a chance to help others and a good way to develop ourselves.So youd better make time to volunteer.

A. To my surpriseB. To be honest C. To start with

答案：

解析：考查介词短语的辨析。后面内容是对volunteering的解释，属于事实。因此用To be honest (说实话)。