keep [kiːp]

【词频】★★★★★

n.生活费，（中世纪的）城堡主楼

v. 保持；遵守；阻止

【例】v.遵守

（2008江苏）Because he thought he had to keep his word.

【译】因为他认为他必须得遵守诺言。

【派】keeper ['kiːpə(r)] n.饲养员；守门员；管理员

become [bɪ'kʌm]

【词频】★★★★★

v.变成；适合；变得

【例】v.变得

（2013广东）Although online classes have existed for more than a decade, the concern over cheating has become sharper in the last year with the growth of "open online courses.”

【译】虽然网络课堂已经存在了十多年，但随着“网络公开课”的发展，人们从去年才开始更多地关注作弊问题。

show [ʃəʊ]

【词频】★★★★★

v.表现；拿给……看；显露；表明

n. 表示；显示；节目；演出

author ['ɔːθə(r)]

【词频】★★★★★

n.作者；作家

【派】authority [ɔː'θɒrəti] n.当局；权力；职权；官方机构；威信

【例】n.威信

（2011上海）But family experts warn that the new equality can also result in less respect for parents."There's still a lot of strictness and authority on the part of parents out there, but there is a change happening,” says Kerrie, a psychology professor at Lebanon Valley College.

【译】但是家庭专家警告说，新的平等也会使孩子不那么尊重父母。“父母那方仍然很严肃、很有威信，不过正在发生改变”，黎巴嫩谷学院的心理学教授凯瑞说。

【形】authenticate [ɔː'θentɪkeɪt] v.鉴定；证明……是真的