expression, n. 表达;表达方式, carefully, adv. 仔细地, nervous, adj. 担忧的, argue, v. 争论, impolite, adj. 不礼貌的, offer, v. 提供；主动提出, speaker, n. 说话者, speech, n. 演说；发言, trust, n./v. 信任；相信, event, n. 公开活动；重要事情, benefit, v.对.....有用；使受用, reply, n./v. 回答；回复, cost, n. 费用, communication, n. 表达；交流, local, adj. 当地的；地方的, pay, v.付费；交纳, social, adj. 社会的；社交的, worry about, 担心, pay attention to , 注意；关注, show interest in, 对......表现出兴趣.

unit8

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