【名词&注释】
改革开放(reform and opening)、科学发展(scientific development)、以人为本(human-oriented)、工作条件(working condition)、构建社会主义和谐社会(constructing socialist harmonious socie ...)、大多数(most)、不可避免(inevitable)、售货员(salesman)
[单选题]20____.
A. doing
B. operating
C. laboring
D. functioning
B. necessarily C. reluctantly D. inevitably