Jenny won the first prize in the piano competition．She was so excited that she _____all night．

A．stayed up       B．showed up     C．made up

1、A  考查动词短语，stay up“熬夜；深夜不睡”；show up“露面”；make up“组成”。根据题干中“Jenny 在钢琴比赛中获得了第一”可知她很兴奋，以至于深夜还“没睡觉”。故选A。