单选题
Much of investors' long-held esteem in the company ______ during the share-market boom when executives were involved in accounting irregularities.
【正确答案】
C
【答案解析】横线处需填入句子的谓语。lose是及物动词，但横线后并没有宾语，因此应为被动语态。状语从句when executives were involved in accounting irregularities是过去时，按照句意主句也应是过去时，故选(C)was lost。