So diffcult it to fit in at school that she decided to drop out.
A. found she
Bdid she find
Cshe found
Dshe did found
网友回答
A. found she
(答案→)B. did she find
C. she found
D. she did found
解析：考察倒装句。So+adj/adv放在句首的时候，后面使用部分倒装的形式，把助动词提到主语前，构成部分倒装。故B正确。句意：她发现适应学校是如此的困难以至于她决定离开学校。