单项选择题She was just about to explain ______ she hadn't passed her maths test chiefly out of carelessness ______ her uncle came.
单项选择题After a long discussion, they ______ an agreement.
单项选择题Ellis Haizlip began his stage career in Washington D. C. , ______ supervised the Howard University Players during their summer season.
单项选择题Some people hold that the more conservative the world becomes, ______ have old furniture, old houses and old paintings.
单项选择题在基础教育阶段,学习英语应以______为主,学习者最主要的终极目标之一是获得______。