The well-dressed lady was caught stealing in the fashion shop, Strangely enough,shehave do

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A. would
B. must
(答案→)C. should
D. might
解析：考查情态动词：句意：穿着讲究的女士在时装店偷东西的时候被抓住了，很奇怪，她竟然做这样的事情。Should have done过去竟然做了，would have done本来会做而没有做，must have done过去一定做了，might have done本来可以做却没有做，选C。