Upon graduation he asked to be sent to ____________.

Upon graduation he asked to be sent to ____________.
A、where he is most needed
B、where he needed
C、where he is mostly needed
D、where is he mostly needed
【正确答案】：A
【题目解析】：most adv. 最 mostly adv. 主要地;通常;多半地, 中文意思的差别。