仓皇失措 [- - shī cuò]be disconcerted; all in a fluster [flutter]; be at a loss as to what to do; be panic-stricken; startled and do not know what to do; be scared out of one's wits; be disturbed not knowing what to do; flat-footed:
•¶ 老师的讯问使他仓皇失措。 The teacher's question caught him flat-footed.