I find difficult to work with the man. [ ]
A. him
B. me
C. it
D. that
答案：C
Care of the soul is a gradual process ________ even the small details of life should be considered. [ ]
A. what
B. in what
C. which
D. in which
一个完整的调节回路由调节器、执行机构、测量装置和（）四部分组成。
A、调节参数
B、调节目标
C、调节对象
D、调节误差
