第一部分：

    1. 流行的： popular = prevailing = prevalent= pervasive

    2. 富裕的：rich = wealthy = affluent = well-to-do = well-off

    3. 消极的，不良的：bad = detrimental= baneful =undesirable

    4. 积极的，好的：good = conducive = beneficial=advantageous

    5. 优秀的：excellent = eminent = top = outstanding

    6. 明显的：obvious = apparent = evident =manifest

    7. 健康的: healthy = robust = sound = wholesome

    8. 惊人的：surprising = amazing = extraordinary = miraculous

    9. 美丽的：beautiful = attractive = gorgeous = eye-catching

    10. 有活力的：energetic = dynamic = vigorous =animated

    11. 贫穷的：poor = needy = impoverished = poverty-stricken
 

    第二部分：

    1. 减轻: ease = alleviate = relieve = lighten

    2. 培养: develop = cultivate = foster = nurture

    3. 解决：solve =resolve =address = tackle =cope with = deal with

    4. 拆除：destroy = tear down = knock down = eradicate

    5. 引起：cause = trigger = endanger

    6. 激发，鼓励：encourage = motivate = stimulate = spur

    7. 保留：keep = preserve = retain = hold

    8. 完成：complete = fulfill = accomplish= achieve

    9. 认为： think = assert= hold = claim = argue

    10. 有害于：destroy = impair = undermine = jeopardize

    11. 提高，加强：improve = enhance= promote = strengthen = optimize

    第三部分：

    1. 人类：human beings= mankind = human race

    2. 优点：advantage = merits = superiority = virtue

    3. 污染：pollution = contamination

    4. 影响：influence= impact

    5. 老师：teachers = instructors = educators = lecturers

    6. 教育：education = schooling = family parenting = upbringing

    7. 老人： old people= the old = the elderly = the aged = senior citizens

    8. 幸福：happiness = cheerfulness = well-being

    9. 青少年：young people = youngsters = youths = adolescents

    10. 危险：danger = perils =hazard

    11. 责任： responsibility = obligation = duty = liability