单选题 His imprisonment ______ his colleagues, for they cannot believe that such a respectable and law-abiding person will take bribes.

【正确答案】 B
【答案解析】(astound使震惊)。句意为：他锒铛入狱让同事们大为震惊，因为他们不相信这样可敬而又遵纪守法的人会受贿。A．evolve进化；C．withhold制止；D．propel推进。