15.Barbara _____ in doing it again though she had failed more than a dozen times.
A. consisted B. resisted C. assisted D. persisted

<B.arbara>
B.arbara 芭芭拉
barbarian 土人
barren 贫瘠的
embarrass 尴尬的
ass 驴子、屁股、傻瓜
crass 愚蠢的、蠢笨的
assassin 暗杀者
critique 批判、评价、评论
</B.arbara>

<assist>
assist 帮助
assistant 助手
consist (of) 组成
persist (in) 坚持
perpetual 永恒的
persistent 固执的、永恒的、持续的
adamant 固执的
obstinate 固执的
resist 拒绝
Resistance 电阻
insist 坚持
</assist>