As long as you ______ what you've been striving for,you will achieve your goal someday.
A、insist on
B、keep up
C、persist in
D、carry through
【正确答案】：C
【题目解析】：insist on意为坚持,坚持主张;keep up意为天气持续不变，与...并驾齐驱；persist in sth./in doing sth.意为顽强地坚持，执著地做，侧重表现人的顽强；carry through意为顺利实现，使渡过难关。C项符合题意。答案为C。
