单选题 In his usual ______ manner, he had insured himself against this type of loss.

【正确答案】 C

【答案解析】(cautious谨慎的)。句意为：他像往常那样谨慎地投了保险，防止这种损失。A．indifferent漠不关心的；B．pensive沉思的，忧郁的；D．caustic刻薄的。