Maria wear a dress at the party yesterday.A.is supposedB.is supposed toC.was supposed toD.should to
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C解析试题分析：根据yesterday可知，本句是过去时，故排除AB；根据should后面跟原形，故排除D。本句的意思是”玛利亚在昨天的晚会上应该穿裙子。”所以本题选C。考点：本题考查时态。
点评：本题一是考查时态，二是考查be supposed to“应该做某事”的用法。还应该知道should后面跟动词原形。