单项选择题
A poor memory （） her efforts to become an actress.
A. encouraged B. accomplished C. frustrated D. develop
单项选择题 （）underamicroscope，afreshsnowflakehasadelicatesix-pointedshape.
单项选择题 Ithasbeen（）forhimbyhisfamilytomarryagirlofhisownclass.
单项选择题 FlightnineteenfromNewYorktoWashingtonisnowarrivingat（）.
