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题目内容双击单词支持查询和收藏哦～
Although the book reveals some surprising information about the sharp-eyed Secret- Service employees, most people already know that such people are far more _____ than the average citizen.
- A.potent
- B.robust
- C.weary
- D.vulnerable
- E.vigilant
- F.mindful
E,F显示答案
以上解析由 考满分老师提供。
