John is a very private person-for most of the time, he ______ hi

John is a very private person-for most of the time, he ______ himself.
A、keeps to
B、keeps from
C、keeps up with
D、keeps down to
【正确答案】：A
【题目解析】：约翰是一个很注重隐私的人——大部分时间他都不与人来往。