单选题 If every employee does his or her ______ to ensure a quality product, this company will surely succeed.
A. most
B. almost
C. utmost
D. mostly

【正确答案】 C

【答案解析】高级问题空格前是形容词性物主代词，因此空格内应填入名词。同时也是考查固定搭配，因此C选项是正确答案。do one's utmost意为“尽某人的最大努力”。